Yiqiu Lu1, Zhenghua Lin1, Longbo Wen1, Wenyu Gao2, Lun Pan2, Xiaoning Li3, Zhikuan Yang3, Weizhong Lan4. 1. Aier School of Ophthalmology, Central South University, Changsha, China. 2. Aier School of Ophthalmology, Central South University, Changsha, China; Aier Institute of Optometry and Vision Science, Aier Eye Hospital Group, Changsha, China. 3. Aier School of Ophthalmology, Central South University, Changsha, China; Aier School of Optometry, Hubei University of Science and Technology, Xianning, China; Aier Institute of Optometry and Vision Science, Aier Eye Hospital Group, Changsha, China. 4. Aier School of Ophthalmology, Central South University, Changsha, China; Aier School of Optometry, Hubei University of Science and Technology, Xianning, China; Aier Institute of Optometry and Vision Science, Aier Eye Hospital Group, Changsha, China. Electronic address: lanweizhong@aierchina.com.
Abstract
PURPOSE: We investigated the adaptability and acceptance of a novel spectacle lens design that was recently reported to achieve a significant antimyopia effect. DESIGN: A prospective, cross-over study. METHODS: 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. RESULTS: 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. CONCLUSION: Mid-peripheral vision through DIMS lenses was slightly affected compared with SV lenses. Otherwise, DIMS lenses received good tolerance and acceptance by Chinese children.
PURPOSE: We investigated the adaptability and acceptance of a novel spectacle lens design that was recently reported to achieve a significant antimyopia effect. DESIGN: A prospective, cross-over study. METHODS: 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. RESULTS: 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. CONCLUSION: Mid-peripheral vision through DIMS lenses was slightly affected compared with SV lenses. Otherwise, DIMS lenses received good tolerance and acceptance by Chinese children.
Authors: Matteo Mario Carlà; Francesco Boselli; Federico Giannuzzi; Gloria Gambini; Tomaso Caporossi; Umberto De Vico; Alfonso Savastano; Antonio Baldascino; Clara Rizzo; Raphael Kilian; Stanislao Rizzo Journal: Vision (Basel) Date: 2022-04-02