Relationship Between Visual Acuity and Refractive Error in Myopia.
- Author:
Tae Mo CHUNG
1
;
Chung Kil CHOI
;
Ouk CHOI
Author Information
1. Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea.
- Publication Type:Original Article
- MeSH:
Academic Medical Centers;
Astigmatism;
Gangwon-do;
Humans;
Myopia*;
Ophthalmology;
Refractive Errors*;
Visual Acuity*
- From:Journal of the Korean Ophthalmological Society
1977;18(4):305-314
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
The purpose of this study is to present quantitative data showing the relationship between visual acuity and refractive error in the various types of myopia: simple myopia, simple myopic astigmatism and compound myopic astigmatism. 1. The study covered 681 patient (1259 eyes) examined by having refractive error in myopia. (-0.25 ~ -20.00D) the Department of Ophthalmology, Yonsei University Medical Center and Wonju Christian Hospital. 2. Plotting the logarithm of visual acuity on the logarithm of the degree of myopia gives a coefficient correlation of -0.8028. The statistical data showed significant in correlation coefficient (r) in various types of myopIa: simple myopia r=-0.7789(p=0.001), simple myopic astigmatism r=-0.7877(p=0.001), compound myopic astigmatism r=-0.7537(p=0.001). 3. The coefficient of determination (R2) was 0.6445. 4. The mathematical mean of the various types of myopia: a. myopIa; simple myopia: 0.29(=20/60), simple myopic astigmatism: 0.87(=20/25), compound myopic astigmatism: 0.29(=20/60). b. visual acuity; simple myopia: -2.53D, simple myopic astigmatism: -0.50D, compound myopic astigmatism: -3.04D. 5. The formulas for the two regression line were: log V=-0.7385 log M-0.4976 (A)(F=2175.7303, p=0.001), log M= -0.8727 log V -0.3641 (B)(F=2175.7303, p=0.001). 6. Confidence limits were determined for the regression lines and table and set up for predicting either the degree of myopia or the visual acuity if the other is known.
