Divya C1*, Aparajita Kar2 and Diwakar Rao3*
1B.Sc Optometry Student, Vittala International Institute of Ophthalmology, Bengaluru, India
2Assistant Professor, Vittala International Instituteof Ophthalmology, Bengaluru, India
3H.O.D and Associate Professor, Vittala International Institute of Ophthalmology, Bengaluru, India
*Corresponding Author: Divya C, B.Sc Optometry Student, Vittala International Institute of Ophthalmology, Bengaluru, India.
Received: March 11, 2024; Published: June 07, 2024
Aim: The purpose of this study is to understand the effect of blue-blocking lenses on visual performance. Objectives: Comparison of visual performance with and without blue-blocking lenses (low block, high block) and assess the following parameters based on groups of refractive errors (myopia, hyperopia and emmetropia).
1. Visual Acuity. 2. Color vision. 3. Contrast sensitivity. 4. Stereopsis.Methods: This Prospective observational study included 45 subjects aged between 18 to 35 years of Vittala International Institute of Ophthalmology. Complete routine eye examination was done, after that subjects were divided into three groups (i.e., emmetropes, myopes and hyperopes) and then visual performances like VA, contrast sensitivity, color vision, stereopsis was assessed with no blue blocking lenses and adaptation time of 15mins was given for low blue blocking lens (3x) on day 1 and high blue blocking lens (5X) on day 2. Visual performance was assessed, post adaptation to each of the blue blocking lenses.
Results: A total of 45 participants were enrolled in the study out of which 16 were males and 29 were females. Mean age was 25.4+_3.5 years. Among the participants, there were 15 emmetropes, 15 myopes and 15 hyperopes. The various parameters in three different conditions in the three refractive group including without blue block lens, with low blue block lens and high blue block lens was assessed. Repeated measures Analysis of Variance (ANOVA) was used to compare between the three conditions for various parameters. Significant differences were found in contrast sensitivity and stereoacuity between no BBLs, with low BBLs and with high BBLs but no significant difference was observed in near vision and color vision. The comparison between the low and high blue block conditions in the three refractive group respectively using a Paired T-test. Statistically significant difference were found in some parameters.
Conclusion: This study tried to analyse the role of BBLs on visual parameters and refractive error. The visual performances on parameters like VA, CS, CV and stereopsis. The result of this study shows that in emmetropes, myopes and hyperopes there is a significant difference in CS and Stereopsis when compared between without BBLs and with BBLs, but when comparing between low BBLs and high BBLs the parameters shows the significant difference in only emmetropes and myopes where there is no significant difference in hyperopes. There was no significant difference was observed in near vision and color vision.
This gives a idea about which of the BBLs dispensing will be better for the best ocular parameters like VA, CS, CV and Stereopsis which are important in clinical routine examination of eye for optometrists and also impact of the BBLs in ocular health.
Keywords: Visual Acuity; Stereopsis; Colorvision; Contrast Sensitivity; Blue-Blocking Lenses; Refractive Errors; Visual Performance
Citation: Divya C., et al. “Effect of Blue Blocking Lenses on Visual Performance".Acta Scientific Ophthalmology 7.7 (2024): 10-23.
Copyright: © 2024 Divya C., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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