The Adaptation and Acceptance of Defocus Incorporated Multiple Segment Lens for Chinese Children

• Published in: American journal of ophthalmology Vol. 211; pp. 207 - 216
• Main Authors: Lu, Yiqiu, Lin, Zhenghua, Wen, Longbo, Gao, Wenyu, Pan, Lun, Li, Xiaoning, Yang, Zhikuan, Lan, Weizhong
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.03.2020; Elsevier Limited
• Subjects: Adaptation, Ocular - physiology; Adolescent; Adult; Adults; Age; Asian Continental Ancestry Group - ethnology; Child; China - epidemiology; Contrast Sensitivity - physiology; Cross-Over Studies; Diabetic retinopathy; Eyeglasses; Female; Humans; Male; Myopia - ethnology; Myopia - physiopathology; Myopia - therapy; Patient Acceptance of Health Care - statistics & numerical data; Prospective Studies; Prosthesis Design; Questionnaires; Surveys and Questionnaires; Visual Acuity - physiology; Young Adult; China; Japan
• DOI: 10.1016/j.ajo.2019.12.002
• ISSN: 0002-9394; 1879-1891

We investigated the adaptability and acceptance of a novel spectacle lens design that was recently reported to achieve a significant antimyopia effect. A prospective, cross-over study. Twenty children were recruited to wear both Defocus Incorporated Multiple Segments (DIMS) and single vision (SV) lens, with a random assignment of which type of lens was experienced first. For each type of lens, high and low contrast central distant visual acuity (VA) and high contrast mid-peripheral near VA were measured at both 500 lux and 50 lux ambient illuminance after 30 minutes' and a week's wearing of the lens. A self-developed questionnaire was applied to evaluate the visual discomfort at the 1-week visit. All quantitative data were analyzed by paired t test, while qualitative data were analyzed with the χ2 or Wilcoxon signed-rank tests. Central VA was not affected by DIMS lens compared with SV lens in all circumstances (all P > .05). However, the mid-peripheral near VA was found to reduce by approximately 0.06 logarithm of minimal angle of resolution unit in 2 of 4 quadrants (500 lux; P < .05) and in 3 quadrants (50 lux; P < .05) for DIMS lenses. No improvement was detected in the 1-week visit. Mid-peripheral blurred vision was the main visual complaint, which was noticed only once or twice a day. Being aware of the average antimyopic efficacy, 90% of children subjects preferred DIMS lenses. Mid-peripheral vision through DIMS lenses was slightly affected compared with SV lenses. Otherwise, DIMS lenses received good tolerance and acceptance by Chinese children.