Measurement Repeatability of Spot™ Vision Screener in a Health Checkup Program for Three-year-old Children

• Published in: JAPANESE ORTHOPTIC JOURNAL Vol. 49; pp. 211 - 216
• Main Authors: Asahi, Kayoko, Ishii, Masako, Tatara, Syunya, Ubukata, Hokuto, Nogami, Reiko
• Format: Journal Article
• Language: Japanese; English
• Published: JAPANESE ASSOCIATION OF CERTIFIED ORTHOPTISTS 2020
• Subjects: certified orthoptist; health check program for three-year-old children; refraction; repeatability; SpotTM Vision Screener
• ISSN: 0387-5172; 1883-9215
• DOI: 10.4263/jorthoptic.49F204

[Purpose] We evaluated the measurement repeatability of Spot™ Vision Screener (SVS) using two consecutive visual acuity measurements in three-year-old children.[Subjects and Methods] Subjects were 1082 eyes of 541 children who had undergone the visual acuity test for 3-year-olds in Tsubame City, Niigata during the 12 months between April 2018 and March 2019.Spherical equivalent, spherical power, and minus cylindrical power (cylindrical power) were measured twice and the two measurements were compared. The differences between the two measurements were obtained, and the measurement repeatability was further analyzed using the Bland-Altman analysis with a 95% limit of agreement. In the 282 eyes with both cylindrical power measurements of ≥ -0.75 D, the cylindrical axis was measured twice and the amount of change was assessed. The 282 eyes were classified to two groups, those with a cylindrical power < -1.75 D and those with a cylindrical power ≥ -1.75 D. The amount of change in the cylindrical axis was compared between both groups.[Results] No differences in the mean values of spherical equivalent, spherical power, and cylindrical power were observed between the two consecutive SVS measurements. The eyes with a higher cylindrical power tended to show greater variability in the two measurements. No difference in the amount of the cylindrical axis change was observed between the two groups. [Conclusion] Measurement repeatability of the SVS was demonstrated in two consecutive measurements of spherical equivalent, spherical power, and cylindrical power. Eyes with higher cylindrical powers tended to show greater variability in two measurements.