Multivariate analysis of repeatability for the Near Eye Tool for Refractive Assessment (NETRA)
ObjectiveTo investigate repeatability of refractive state using a smartphone-based assessment tool, the Near Eye Tool for Refractive Assessment (NETRA).Methods and analysisThis study included 279 participants, predominantly female (66.7%) of African descent (49.1%). The age range was 9–63 years with...
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| Published in | BMJ open ophthalmology Vol. 8; no. 1; p. e001458 |
|---|---|
| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
England
BMJ Publishing Group Ltd
24.11.2023
BMJ Publishing Group LTD BMJ Publishing Group |
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| Online Access | Get full text |
| ISSN | 2397-3269 2397-3269 |
| DOI | 10.1136/bmjophth-2023-001458 |
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| Abstract | ObjectiveTo investigate repeatability of refractive state using a smartphone-based assessment tool, the Near Eye Tool for Refractive Assessment (NETRA).Methods and analysisThis study included 279 participants, predominantly female (66.7%) of African descent (49.1%). The age range was 9–63 years with mean age (s) 22.6 (8.9) years. Two consecutive measurements per eye with the NETRA were measured for both eyes of all participants. However, analyses for the right eyes only are included here. Multivariate statistical analysis included stereo-pair comets and scatterplots with 95% surfaces of constant probability density. Correlation coefficients for repeated samples were determined. Repeatability and agreement for NETRA were assessed with Bland-Altman plots, coefficients of repeatability (CR=1.96sd ; sd is the SD of differences) and intraclass correlation coefficients (ICCs).ResultsBland-Altman plots, within-subject SD (sw), coefficients of repeatability and ICC indicated that repeated measurements were similar for many but not all eyes and there was good agreement (ICC=0.96) for the spherical coefficient (FI=M) but less so for antistigmatic coefficients (FJ=J0 and FK=J45) of power. Although mean differences for repeated samples were almost zero, 95% limits of agreement widths were larger for the stigmatic coefficients. Without cycloplegia, repeatability (2.77sw) was 1.63 D, 0.58 D and 0.56 D for the stigmatic and antistigmatic coefficients, respectively.ConclusionNETRA is a potentially useful and inexpensive portable method in clinical and primary health settings, and especially in less-developed regions of the world. The subjective nature of the self-refraction task can be challenging for younger individuals, and cycloplegia is recommended for NETRA with such patients. |
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| AbstractList | ObjectiveTo investigate repeatability of refractive state using a smartphone-based assessment tool, the Near Eye Tool for Refractive Assessment (NETRA).Methods and analysisThis study included 279 participants, predominantly female (66.7%) of African descent (49.1%). The age range was 9–63 years with mean age (s) 22.6 (8.9) years. Two consecutive measurements per eye with the NETRA were measured for both eyes of all participants. However, analyses for the right eyes only are included here. Multivariate statistical analysis included stereo-pair comets and scatterplots with 95% surfaces of constant probability density. Correlation coefficients for repeated samples were determined. Repeatability and agreement for NETRA were assessed with Bland-Altman plots, coefficients of repeatability (CR=1.96sd ; sd is the SD of differences) and intraclass correlation coefficients (ICCs).ResultsBland-Altman plots, within-subject SD (sw), coefficients of repeatability and ICC indicated that repeated measurements were similar for many but not all eyes and there was good agreement (ICC=0.96) for the spherical coefficient (FI=M) but less so for antistigmatic coefficients (FJ=J0 and FK=J45) of power. Although mean differences for repeated samples were almost zero, 95% limits of agreement widths were larger for the stigmatic coefficients. Without cycloplegia, repeatability (2.77sw) was 1.63 D, 0.58 D and 0.56 D for the stigmatic and antistigmatic coefficients, respectively.ConclusionNETRA is a potentially useful and inexpensive portable method in clinical and primary health settings, and especially in less-developed regions of the world. The subjective nature of the self-refraction task can be challenging for younger individuals, and cycloplegia is recommended for NETRA with such patients. To investigate repeatability of refractive state using a smartphone-based assessment tool, the Near Eye Tool for Refractive Assessment (NETRA).OBJECTIVETo investigate repeatability of refractive state using a smartphone-based assessment tool, the Near Eye Tool for Refractive Assessment (NETRA).This study included 279 participants, predominantly female (66.7%) of African descent (49.1%). The age range was 9-63 years with mean age (s) 22.6 (8.9) years. Two consecutive measurements per eye with the NETRA were measured for both eyes of all participants. However, analyses for the right eyes only are included here. Multivariate statistical analysis included stereo-pair comets and scatterplots with 95% surfaces of constant probability density. Correlation coefficients for repeated samples were determined. Repeatability and agreement for NETRA were assessed with Bland-Altman plots, coefficients of repeatability ([Formula: see text] ; [Formula: see text] is the SD of differences) and intraclass correlation coefficients (ICCs).METHODS AND ANALYSISThis study included 279 participants, predominantly female (66.7%) of African descent (49.1%). The age range was 9-63 years with mean age (s) 22.6 (8.9) years. Two consecutive measurements per eye with the NETRA were measured for both eyes of all participants. However, analyses for the right eyes only are included here. Multivariate statistical analysis included stereo-pair comets and scatterplots with 95% surfaces of constant probability density. Correlation coefficients for repeated samples were determined. Repeatability and agreement for NETRA were assessed with Bland-Altman plots, coefficients of repeatability ([Formula: see text] ; [Formula: see text] is the SD of differences) and intraclass correlation coefficients (ICCs).Bland-Altman plots, within-subject SD (sw ), coefficients of repeatability and ICC indicated that repeated measurements were similar for many but not all eyes and there was good agreement (ICC=0.96) for the spherical coefficient (F I=M) but less so for antistigmatic coefficients (F J=J 0 and F K=J 45) of power. Although mean differences for repeated samples were almost zero, 95% limits of agreement widths were larger for the stigmatic coefficients. Without cycloplegia, repeatability (2.77sw ) was 1.63 D, 0.58 D and 0.56 D for the stigmatic and antistigmatic coefficients, respectively.RESULTSBland-Altman plots, within-subject SD (sw ), coefficients of repeatability and ICC indicated that repeated measurements were similar for many but not all eyes and there was good agreement (ICC=0.96) for the spherical coefficient (F I=M) but less so for antistigmatic coefficients (F J=J 0 and F K=J 45) of power. Although mean differences for repeated samples were almost zero, 95% limits of agreement widths were larger for the stigmatic coefficients. Without cycloplegia, repeatability (2.77sw ) was 1.63 D, 0.58 D and 0.56 D for the stigmatic and antistigmatic coefficients, respectively.NETRA is a potentially useful and inexpensive portable method in clinical and primary health settings, and especially in less-developed regions of the world. The subjective nature of the self-refraction task can be challenging for younger individuals, and cycloplegia is recommended for NETRA with such patients.CONCLUSIONNETRA is a potentially useful and inexpensive portable method in clinical and primary health settings, and especially in less-developed regions of the world. The subjective nature of the self-refraction task can be challenging for younger individuals, and cycloplegia is recommended for NETRA with such patients. Objective To investigate repeatability of refractive state using a smartphone-based assessment tool, the Near Eye Tool for Refractive Assessment (NETRA).Methods and analysis This study included 279 participants, predominantly female (66.7%) of African descent (49.1%). The age range was 9–63 years with mean age (s) 22.6 (8.9) years. Two consecutive measurements per eye with the NETRA were measured for both eyes of all participants. However, analyses for the right eyes only are included here. Multivariate statistical analysis included stereo-pair comets and scatterplots with 95% surfaces of constant probability density. Correlation coefficients for repeated samples were determined. Repeatability and agreement for NETRA were assessed with Bland-Altman plots, coefficients of repeatability (CR=1.96sd ; sd is the SD of differences) and intraclass correlation coefficients (ICCs).Results Bland-Altman plots, within-subject SD (sw), coefficients of repeatability and ICC indicated that repeated measurements were similar for many but not all eyes and there was good agreement (ICC=0.96) for the spherical coefficient (FI=M) but less so for antistigmatic coefficients (FJ=J0 and FK=J45) of power. Although mean differences for repeated samples were almost zero, 95% limits of agreement widths were larger for the stigmatic coefficients. Without cycloplegia, repeatability (2.77sw) was 1.63 D, 0.58 D and 0.56 D for the stigmatic and antistigmatic coefficients, respectively.Conclusion NETRA is a potentially useful and inexpensive portable method in clinical and primary health settings, and especially in less-developed regions of the world. The subjective nature of the self-refraction task can be challenging for younger individuals, and cycloplegia is recommended for NETRA with such patients. To investigate repeatability of refractive state using a smartphone-based assessment tool, the Near Eye Tool for Refractive Assessment (NETRA). This study included 279 participants, predominantly female (66.7%) of African descent (49.1%). The age range was 9-63 years with mean age ( ) 22.6 (8.9) years. Two consecutive measurements per eye with the NETRA were measured for both eyes of all participants. However, analyses for the right eyes only are included here. Multivariate statistical analysis included stereo-pair comets and scatterplots with 95% surfaces of constant probability density. Correlation coefficients for repeated samples were determined. Repeatability and agreement for NETRA were assessed with Bland-Altman plots, coefficients of repeatability ([Formula: see text] ; [Formula: see text] is the SD of differences) and intraclass correlation coefficients (ICCs). Bland-Altman plots, within-subject SD ( ), coefficients of repeatability and ICC indicated that repeated measurements were similar for many but not all eyes and there was good agreement (ICC=0.96) for the spherical coefficient ( = ) but less so for antistigmatic coefficients ( = and = ) of power. Although mean differences for repeated samples were almost zero, 95% limits of agreement widths were larger for the stigmatic coefficients. Without cycloplegia, repeatability (2.77 ) was 1.63 D, 0.58 D and 0.56 D for the stigmatic and antistigmatic coefficients, respectively. NETRA is a potentially useful and inexpensive portable method in clinical and primary health settings, and especially in less-developed regions of the world. The subjective nature of the self-refraction task can be challenging for younger individuals, and cycloplegia is recommended for NETRA with such patients. |
| Author | Rubin, Alan Hasrod, Nabeela |
| Author_xml | – sequence: 1 givenname: Nabeela orcidid: 0000-0002-4105-5513 surname: Hasrod fullname: Hasrod, Nabeela email: nabeelah@uj.ac.za organization: Optometry, University of Johannesburg, Johannesburg, Gauteng, South Africa – sequence: 2 givenname: Alan orcidid: 0000-0001-6217-7862 surname: Rubin fullname: Rubin, Alan organization: Optometry, University of Johannesburg, Johannesburg, Gauteng, South Africa |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/38007230$$D View this record in MEDLINE/PubMed |
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| Cites_doi | 10.1097/00006324-199001000-00008 10.1111/opo.12009 10.1016/0275-5408(90)90134-K 10.1097/00006324-199005000-00010 10.1111/j.1475-1313.1991.tb00239.x 10.1111/j.1475-1313.2011.00851.x 10.1111/j.1600-0420.2006.00695.x 10.1186/s12886-022-02684-5 10.1111/j.1475-1313.1988.tb01185.x 10.1111/cxo.13003 10.1097/00006324-200111000-00014 10.1136/bmjophth-2021-000929 10.1097/OPX.0000000000000513 10.1111/j.1475-1313.1990.tb00976.x 10.1097/OPX.0000000000000999 10.1167/4.4.9 10.1080/09286586.2021.1986550 10.1111/j.1475-1313.1990.tb00883.x 10.1097/00006324-198810000-00003 10.1111/j.1475-1313.1991.tb00212.x 10.1016/j.optom.2018.09.001 10.1097/OPX.0000000000001308 10.7309/jmtm.17 10.1177/096228029900800204 10.1136/bmjophth-2021-000851 10.1097/00006324-199201000-00009 10.1111/j.1444-0938.1990.tb03110.x 10.1001/jama.2013.281053 10.1097/00006324-199706000-00019 10.1136/bmj.312.7047.1654 10.1145/1833349.1778814 10.1016/S0140-6736(86)90837-8 10.1111/j.1475-1313.1989.tb00952.x 10.1136/bjo.2009.175901 10.1167/4.8.329 10.1364/FIO.2014.FW3F.2 |
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| References | Armstrong (R37) 2013; 33 Harris (R14) 1988; 65 Harris (R23) 1990; 10 Harris (R25) 2001; 78 Harris (R15) 1988; 8 Pamplona, Kartik, Bharadwaj (R4) 2014; 55 Bastawrous, Leak, Howard (R9) 2012; 1 Rubin, Evans, Hasrod (R27) 2022; 7 Thibos, Wheeler, Horner (R35) 1997; 74 Harris (R19) 1990; 67 Otero, Aldaba, Pujol (R41) 2019; 12 Harris (R18) 1990; 73 Bland, Altman (R39) 1996; 312 Carkeet (R33) 2015; 92 Leinonen, Laakkonen, Laatikainen (R2) 2006; 84 Bland, Altman (R29) 1986; 1 Lang, Pakter, Ferreira (R12) 2012; 53 Pesala, Srinivasan, Solomon (R11) 2011; 52 Harris (R20) 1990; 10 Rao, Negiloni, Gurunathan (R46) 2022; 22 Pamplona, Turpin, Cuadros (R6) 2015; 56 Li, Leibold, Binder (R43) 2018; 59 Rosenfield, Ciuffreda (R45) 2017; 94 Miwa (R48) 1992; 69 Harris (R16) 1989; 48 Thibos, Hong, Bradley (R1) 2004; 4 Bland, Altman (R38) 1999; 8 (R28) 2013; 310 Tousignant, Garceau, Bouffard-Saint-Pierre (R40) 2020; 103 Ee, Samsudin (R44) 2022; 29 Harris (R24) 1991; 11 Harris (R21) 1990; 10 Harris, Malan, Rubin (R34) 1991; 11 Solaka, Modi, Gaiser (R10) 2014; 55 McAlinden, Khadka, Pesudovs (R31) 2011; 31 Hasrod, Rubin (R8) 2022; 7 Jeganathan, Valikodath, Niziol (R42) 2018; 95 Harris (R17) 1989; 9 Loughman (R32) 2010; 94 Gaiser, Moore, Pamplona (R13) 2013; 54 Harris (R22) 1990; 67 Bastawrous (2025090110182599000_8.1.e001458.9) 2012; 1 Harris (2025090110182599000_8.1.e001458.16) 1989; 48 2025090110182599000_8.1.e001458.5 Pamplona (2025090110182599000_8.1.e001458.6) 2015; 56 Rao (2025090110182599000_8.1.e001458.46) 2022; 22 2025090110182599000_8.1.e001458.7 2025090110182599000_8.1.e001458.2 2025090110182599000_8.1.e001458.1 Jeganathan (2025090110182599000_8.1.e001458.42) 2018; 95 2025090110182599000_8.1.e001458.3 2025090110182599000_8.1.e001458.29 Harris (2025090110182599000_8.1.e001458.19) 1990; 67 2025090110182599000_8.1.e001458.39 Gaiser (2025090110182599000_8.1.e001458.13) 2013; 54 Harris (2025090110182599000_8.1.e001458.18) 1990; 73 Harris (2025090110182599000_8.1.e001458.23) 1990; 10 2025090110182599000_8.1.e001458.38 2025090110182599000_8.1.e001458.37 2025090110182599000_8.1.e001458.14 2025090110182599000_8.1.e001458.36 2025090110182599000_8.1.e001458.35 2025090110182599000_8.1.e001458.33 Lang (2025090110182599000_8.1.e001458.12) 2012; 53 2025090110182599000_8.1.e001458.32 2025090110182599000_8.1.e001458.31 2025090110182599000_8.1.e001458.30 Otero (2025090110182599000_8.1.e001458.41) 2019; 12 Harris (2025090110182599000_8.1.e001458.24) 1991; 11 Harris (2025090110182599000_8.1.e001458.15) 1988; 8 Rosenfield (2025090110182599000_8.1.e001458.45) 2017; 94 Tousignant (2025090110182599000_8.1.e001458.40) 2020; 103 Harris (2025090110182599000_8.1.e001458.17) 1989; 9 Harris (2025090110182599000_8.1.e001458.22) 1990; 67 Pamplona (2025090110182599000_8.1.e001458.4) 2014; 55 Ee (2025090110182599000_8.1.e001458.44) 2022; 29 Solaka (2025090110182599000_8.1.e001458.10) 2014; 55 Harris (2025090110182599000_8.1.e001458.25) 2001; 78 2025090110182599000_8.1.e001458.28 Hasrod (2025090110182599000_8.1.e001458.8) 2022; 7 2025090110182599000_8.1.e001458.26 2025090110182599000_8.1.e001458.48 Harris (2025090110182599000_8.1.e001458.34) 1991; 11 2025090110182599000_8.1.e001458.47 Pesala (2025090110182599000_8.1.e001458.11) 2011; 52 Li (2025090110182599000_8.1.e001458.43) 2018; 59 Rubin (2025090110182599000_8.1.e001458.27) 2022; 7 2025090110182599000_8.1.e001458.21 Harris (2025090110182599000_8.1.e001458.20) 1990; 10 |
| References_xml | – volume: 53 start-page: 3596 year: 2012 ident: R12 article-title: Comparison of a cell phone-based refraction technique (NETRA) with auto-refraction publication-title: Investig Ophthalmol Vis Sci – volume: 67 start-page: 36 year: 1990 ident: R19 article-title: Elements of the dioptric power matrix and the concept of torsional power: a reinterpretation publication-title: Optom Vis Sci doi: 10.1097/00006324-199001000-00008 – volume: 33 start-page: 7 year: 2013 ident: R37 article-title: Statistical guidelines for the analysis of data obtained from one or both eyes publication-title: Ophthalmic Physiol Opt doi: 10.1111/opo.12009 – volume: 10 start-page: 72 year: 1990 ident: R23 article-title: Direct, Vec and other squares, and sample variance-covariance of Dioptric power publication-title: Ophthalmic and Physiological Optics doi: 10.1016/0275-5408(90)90134-K – volume: 67 start-page: 359 year: 1990 ident: R22 article-title: Mean of a sample of equivalent dioptric powers publication-title: Optom Vis Sci doi: 10.1097/00006324-199005000-00010 – volume: 11 start-page: 381 year: 1991 ident: R34 article-title: The distribution of dioptric power: ellipsoids of constant probability density publication-title: Ophthalmic Physiol Opt doi: 10.1111/j.1475-1313.1991.tb00239.x – volume: 48 start-page: 81 year: 1989 ident: R16 article-title: The matrix representation of dioptric power. part 3: the average of refractive error publication-title: The South African Optometrist – volume: 31 start-page: 330 year: 2011 ident: R31 article-title: Statistical methods conducting agreement (comparison of clinical tests) and precision (Repeatability and reproducibility) studies in Optometry and Ophthalmology publication-title: Ophthalmic Physiol Opt doi: 10.1111/j.1475-1313.2011.00851.x – volume: 84 start-page: 532 year: 2006 ident: R2 article-title: Repeatability (Test‐Retest variability) of refractive error measurement in clinical settings publication-title: Acta Ophthalmol Scand doi: 10.1111/j.1600-0420.2006.00695.x – volume: 22 year: 2022 ident: R46 article-title: Validation of a simple-to-use, affordable, portable, Wavefront Aberrometry-based auto Refractometer in the adult population: A prospective study publication-title: BMC Ophthalmol doi: 10.1186/s12886-022-02684-5 – volume: 52 start-page: 2852 year: 2011 ident: R11 article-title: Comparison of a novel cell phone-based refraction technique (NETRA) with objective clinical Retinoscopy publication-title: Investig Ophthalmol Vis Sci – volume: 8 start-page: 458 year: 1988 ident: R15 article-title: Squaring the Sphero-cylinder, the equivalent of squaring the refractive power matrix publication-title: Ophthalmic Physiol Opt doi: 10.1111/j.1475-1313.1988.tb01185.x – volume: 56 start-page: 2211 year: 2015 ident: R6 article-title: Validation of confidence levels for a cell phone-based Refractor (NETRA-G) publication-title: Investig Ophthalmol Vis Sci – volume: 103 start-page: 501 year: 2020 ident: R40 article-title: Comparing the Netra smartphone refractor to subjective refraction publication-title: Clin Exp Optom doi: 10.1111/cxo.13003 – volume: 78 start-page: 839 year: 2001 ident: R25 article-title: Clinical measurement, artefact and data analysis in dioptric power space publication-title: Optom Vis Sci doi: 10.1097/00006324-200111000-00014 – volume: 7 year: 2022 ident: R27 article-title: Dioptric power and refractive behaviour: a review of methods and applications publication-title: BMJ Open Ophthalmol doi: 10.1136/bmjophth-2021-000929 – volume: 92 start-page: e71 year: 2015 ident: R33 article-title: Exact parametric confidence intervals for Bland-Altman limits of agreement publication-title: Optom Vis Sci doi: 10.1097/OPX.0000000000000513 – volume: 10 start-page: 200 year: 1990 ident: R20 article-title: Comparison of dioptric power publication-title: Ophthalmic Physiol Opt doi: 10.1111/j.1475-1313.1990.tb00976.x – volume: 94 start-page: 159 year: 2017 ident: R45 article-title: Evaluation of the Svone Handheld Autorefractor in a pediatric population publication-title: Optom Vis Sci doi: 10.1097/OPX.0000000000000999 – volume: 4 start-page: 329 year: 2004 ident: R1 article-title: Accuracy and precision of objective refraction from wavefront aberrations publication-title: J Vis doi: 10.1167/4.4.9 – volume: 29 start-page: 588 year: 2022 ident: R44 article-title: Comparison of Smartphone-based and automated refraction with subjective refraction for screening of refractive errors publication-title: Ophthalmic Epidemiology doi: 10.1080/09286586.2021.1986550 – volume: 10 start-page: 363 year: 1990 ident: R21 article-title: Statistical inference on mean dioptric power: hypothesis testing and confidence regions publication-title: Ophthalmic Physiol Opt doi: 10.1111/j.1475-1313.1990.tb00883.x – volume: 65 start-page: 794 year: 1988 ident: R14 article-title: Algebra of Sphero-cylinders and refractive errors, and their means, variance, and standard deviation publication-title: Am J Optom Physiol Opt doi: 10.1097/00006324-198810000-00003 – volume: 11 start-page: 130 year: 1991 ident: R24 article-title: Representation of Dioptric power in Euclidean 3-space publication-title: Ophthalmic Physiol Opt doi: 10.1111/j.1475-1313.1991.tb00212.x – volume: 59 start-page: 3407 year: 2018 ident: R43 article-title: Comparison of automated self-refraction using NETRA with table-mounted Autorefractor and subjective refraction in an academic Optometry clinic publication-title: Invest Ophthalmol Vis Sci – volume: 94 start-page: 753 year: 2010 ident: R32 article-title: The statistical interpretation of the coefficient of repeatability publication-title: Br J Ophthalmol – volume: 55 start-page: 2723 year: 2014 ident: R4 article-title: Identification and comparison of critical axis combinations for estimating the refractive power of the eye using NETRA publication-title: Investig Ophthalmol Vis Sci – volume: 12 start-page: 74 year: 2019 ident: R41 article-title: Clinical evaluation of an automated subjective refraction method implemented in a computer-controlled motorized phoropter publication-title: J Optom doi: 10.1016/j.optom.2018.09.001 – volume: 95 start-page: 1135 year: 2018 ident: R42 article-title: Accuracy of a smartphone-based autorefractor compared with criterion-standard refraction publication-title: Optom Vis Sci doi: 10.1097/OPX.0000000000001308 – volume: 55 start-page: 2722 year: 2014 ident: R10 article-title: Comparison of a new prototype of NETRA-G Cellphone based refraction with subjective refraction publication-title: Investig Ophthalmol Vis Sci – volume: 54 start-page: 2340 year: 2013 ident: R13 article-title: Comparison of a novel cell phone-based refraction technique (Netra-G) with subjective refraction publication-title: Investig Ophthalmol Vis Sci – volume: 1 start-page: 6 year: 2012 ident: R9 article-title: Validation of near eye tool for refractive assessment (NETRA) - pilot study publication-title: Journalmtm doi: 10.7309/jmtm.17 – volume: 8 start-page: 135 year: 1999 ident: R38 article-title: Measuring agreement in method comparison studies publication-title: Stat Methods Med Res doi: 10.1177/096228029900800204 – volume: 9 start-page: 455 year: 1989 ident: R17 article-title: Simplified rational representation of dioptric power publication-title: Ophthalmic Physiol Opt – volume: 7 year: 2022 ident: R8 article-title: Comparison of the near eye tool for refractive assessment (NETRA) on non-cycloplegic subjective refraction publication-title: BMJ Open Ophthalmol doi: 10.1136/bmjophth-2021-000851 – volume: 69 start-page: 55 year: 1992 ident: R48 article-title: Instrument myopia and the resting state of accommodation publication-title: Optom Vis Sci doi: 10.1097/00006324-199201000-00009 – volume: 1 start-page: 307 year: 1986 ident: R29 article-title: Statistical methods for assessing agreement between two methods of clinical measurement publication-title: Lancet – volume: 73 start-page: 89 year: 1990 ident: R18 article-title: The mean and variance of samples of dioptric powers: the basic calculations publication-title: Clinical and Experimental Optometry doi: 10.1111/j.1444-0938.1990.tb03110.x – volume: 310 start-page: 2191 year: 2013 ident: R28 article-title: Declaration of Helsinki: ethical principles for medical research involving human subjects publication-title: JAMA doi: 10.1001/jama.2013.281053 – volume: 74 start-page: 367 year: 1997 ident: R35 article-title: Power vectors: an application of Fourier analysis to the description and statistical analysis of refractive error publication-title: Optom Vis Sci doi: 10.1097/00006324-199706000-00019 – volume: 312 start-page: 1654 year: 1996 ident: R39 article-title: Measurement error publication-title: BMJ doi: 10.1136/bmj.312.7047.1654 – volume: 67 start-page: 359 year: 1990 ident: 2025090110182599000_8.1.e001458.22 article-title: Mean of a sample of equivalent dioptric powers publication-title: Optom Vis Sci doi: 10.1097/00006324-199005000-00010 – ident: 2025090110182599000_8.1.e001458.33 doi: 10.1097/OPX.0000000000000513 – volume: 59 start-page: 3407 year: 2018 ident: 2025090110182599000_8.1.e001458.43 article-title: Comparison of automated self-refraction using NETRA with table-mounted Autorefractor and subjective refraction in an academic Optometry clinic publication-title: Invest Ophthalmol Vis Sci – volume: 11 start-page: 381 year: 1991 ident: 2025090110182599000_8.1.e001458.34 article-title: The distribution of dioptric power: ellipsoids of constant probability density publication-title: Ophthalmic Physiol Opt doi: 10.1111/j.1475-1313.1991.tb00239.x – volume: 55 start-page: 2722 year: 2014 ident: 2025090110182599000_8.1.e001458.10 article-title: Comparison of a new prototype of NETRA-G Cellphone based refraction with subjective refraction publication-title: Investig Ophthalmol Vis Sci – volume: 10 start-page: 72 year: 1990 ident: 2025090110182599000_8.1.e001458.23 article-title: Direct, Vec and other squares, and sample variance-covariance of Dioptric power publication-title: Ophthalmic and Physiological Optics – ident: 2025090110182599000_8.1.e001458.7 doi: 10.1145/1833349.1778814 – ident: 2025090110182599000_8.1.e001458.29 doi: 10.1016/S0140-6736(86)90837-8 – volume: 10 start-page: 200 year: 1990 ident: 2025090110182599000_8.1.e001458.20 article-title: Comparison of dioptric power publication-title: Ophthalmic Physiol Opt doi: 10.1111/j.1475-1313.1990.tb00976.x – volume: 94 start-page: 159 year: 2017 ident: 2025090110182599000_8.1.e001458.45 article-title: Evaluation of the Svone Handheld Autorefractor in a pediatric population publication-title: Optom Vis Sci doi: 10.1097/OPX.0000000000000999 – volume: 9 start-page: 455 year: 1989 ident: 2025090110182599000_8.1.e001458.17 article-title: Simplified rational representation of dioptric power publication-title: Ophthalmic Physiol Opt doi: 10.1111/j.1475-1313.1989.tb00952.x – volume: 67 start-page: 36 year: 1990 ident: 2025090110182599000_8.1.e001458.19 article-title: Elements of the dioptric power matrix and the concept of torsional power: a reinterpretation publication-title: Optom Vis Sci doi: 10.1097/00006324-199001000-00008 – ident: 2025090110182599000_8.1.e001458.32 doi: 10.1136/bjo.2009.175901 – volume: 103 start-page: 501 year: 2020 ident: 2025090110182599000_8.1.e001458.40 article-title: Comparing the Netra smartphone refractor to subjective refraction publication-title: Clin Exp Optom doi: 10.1111/cxo.13003 – volume: 52 start-page: 2852 year: 2011 ident: 2025090110182599000_8.1.e001458.11 article-title: Comparison of a novel cell phone-based refraction technique (NETRA) with objective clinical Retinoscopy publication-title: Investig Ophthalmol Vis Sci – volume: 48 start-page: 81 year: 1989 ident: 2025090110182599000_8.1.e001458.16 article-title: The matrix representation of dioptric power. part 3: the average of refractive error publication-title: The South African Optometrist – volume: 8 start-page: 458 year: 1988 ident: 2025090110182599000_8.1.e001458.15 article-title: Squaring the Sphero-cylinder, the equivalent of squaring the refractive power matrix publication-title: Ophthalmic Physiol Opt doi: 10.1111/j.1475-1313.1988.tb01185.x – volume: 73 start-page: 89 year: 1990 ident: 2025090110182599000_8.1.e001458.18 article-title: The mean and variance of samples of dioptric powers: the basic calculations publication-title: Clinical and Experimental Optometry doi: 10.1111/j.1444-0938.1990.tb03110.x – ident: 2025090110182599000_8.1.e001458.30 – ident: 2025090110182599000_8.1.e001458.1 doi: 10.1167/4.8.329 – ident: 2025090110182599000_8.1.e001458.36 – ident: 2025090110182599000_8.1.e001458.48 doi: 10.1097/00006324-199201000-00009 – volume: 78 start-page: 839 year: 2001 ident: 2025090110182599000_8.1.e001458.25 article-title: Clinical measurement, artefact and data analysis in dioptric power space publication-title: Optom Vis Sci doi: 10.1097/00006324-200111000-00014 – ident: 2025090110182599000_8.1.e001458.28 doi: 10.1001/jama.2013.281053 – ident: 2025090110182599000_8.1.e001458.38 doi: 10.1177/096228029900800204 – ident: 2025090110182599000_8.1.e001458.47 – volume: 22 year: 2022 ident: 2025090110182599000_8.1.e001458.46 article-title: Validation of a simple-to-use, affordable, portable, Wavefront Aberrometry-based auto Refractometer in the adult population: A prospective study publication-title: BMC Ophthalmol doi: 10.1186/s12886-022-02684-5 – volume: 1 start-page: 6 year: 2012 ident: 2025090110182599000_8.1.e001458.9 article-title: Validation of near eye tool for refractive assessment (NETRA) - pilot study publication-title: Journalmtm doi: 10.7309/jmtm.17 – volume: 12 start-page: 74 year: 2019 ident: 2025090110182599000_8.1.e001458.41 article-title: Clinical evaluation of an automated subjective refraction method implemented in a computer-controlled motorized phoropter publication-title: J Optom doi: 10.1016/j.optom.2018.09.001 – ident: 2025090110182599000_8.1.e001458.26 – ident: 2025090110182599000_8.1.e001458.2 doi: 10.1111/j.1600-0420.2006.00695.x – volume: 95 start-page: 1135 year: 2018 ident: 2025090110182599000_8.1.e001458.42 article-title: Accuracy of a smartphone-based autorefractor compared with criterion-standard refraction publication-title: Optom Vis Sci doi: 10.1097/OPX.0000000000001308 – ident: 2025090110182599000_8.1.e001458.14 doi: 10.1097/00006324-198810000-00003 – volume: 11 start-page: 130 year: 1991 ident: 2025090110182599000_8.1.e001458.24 article-title: Representation of Dioptric power in Euclidean 3-space publication-title: Ophthalmic Physiol Opt doi: 10.1111/j.1475-1313.1991.tb00212.x – volume: 29 start-page: 588 year: 2022 ident: 2025090110182599000_8.1.e001458.44 article-title: Comparison of Smartphone-based and automated refraction with subjective refraction for screening of refractive errors publication-title: Ophthalmic Epidemiology doi: 10.1080/09286586.2021.1986550 – volume: 55 start-page: 2723 year: 2014 ident: 2025090110182599000_8.1.e001458.4 article-title: Identification and comparison of critical axis combinations for estimating the refractive power of the eye using NETRA publication-title: Investig Ophthalmol Vis Sci – volume: 7 year: 2022 ident: 2025090110182599000_8.1.e001458.27 article-title: Dioptric power and refractive behaviour: a review of methods and applications publication-title: BMJ Open Ophthalmol doi: 10.1136/bmjophth-2021-000929 – ident: 2025090110182599000_8.1.e001458.39 doi: 10.1136/bmj.312.7047.1654 – volume: 54 start-page: 2340 year: 2013 ident: 2025090110182599000_8.1.e001458.13 article-title: Comparison of a novel cell phone-based refraction technique (Netra-G) with subjective refraction publication-title: Investig Ophthalmol Vis Sci – volume: 53 start-page: 3596 year: 2012 ident: 2025090110182599000_8.1.e001458.12 article-title: Comparison of a cell phone-based refraction technique (NETRA) with auto-refraction publication-title: Investig Ophthalmol Vis Sci – ident: 2025090110182599000_8.1.e001458.37 doi: 10.1111/opo.12009 – volume: 7 year: 2022 ident: 2025090110182599000_8.1.e001458.8 article-title: Comparison of the near eye tool for refractive assessment (NETRA) on non-cycloplegic subjective refraction publication-title: BMJ Open Ophthalmol doi: 10.1136/bmjophth-2021-000851 – ident: 2025090110182599000_8.1.e001458.31 doi: 10.1111/j.1475-1313.2011.00851.x – volume: 56 start-page: 2211 year: 2015 ident: 2025090110182599000_8.1.e001458.6 article-title: Validation of confidence levels for a cell phone-based Refractor (NETRA-G) publication-title: Investig Ophthalmol Vis Sci – ident: 2025090110182599000_8.1.e001458.5 doi: 10.1364/FIO.2014.FW3F.2 – ident: 2025090110182599000_8.1.e001458.21 doi: 10.1111/j.1475-1313.1990.tb00883.x – ident: 2025090110182599000_8.1.e001458.35 doi: 10.1097/00006324-199706000-00019 – ident: 2025090110182599000_8.1.e001458.3 |
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| Snippet | ObjectiveTo investigate repeatability of refractive state using a smartphone-based assessment tool, the Near Eye Tool for Refractive Assessment (NETRA).Methods... To investigate repeatability of refractive state using a smartphone-based assessment tool, the Near Eye Tool for Refractive Assessment (NETRA). This study... To investigate repeatability of refractive state using a smartphone-based assessment tool, the Near Eye Tool for Refractive Assessment (NETRA).OBJECTIVETo... Objective To investigate repeatability of refractive state using a smartphone-based assessment tool, the Near Eye Tool for Refractive Assessment... |
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| SubjectTerms | Adolescent Adult Agreements Astigmatism Child Comets Cornea Diagnostic tests/Investigation Face Female Humans Hypothesis testing Linear algebra Male Middle Aged Multivariate analysis Myopia Optics and Refraction Presbyopia Public health Refraction, Ocular Smartphones Statistical analysis Validity Vision Science Vision Tests Visual acuity Young Adult |
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| Title | Multivariate analysis of repeatability for the Near Eye Tool for Refractive Assessment (NETRA) |
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