Premium
A new method for assessing central and peripheral visual acuity
Author(s) -
CHUNG H,
LEE YW,
SEO JM
Publication year - 2011
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.2011.469.x
Subject(s) - visual acuity , peripheral vision , visual angle , optometry , visual field , peripheral , computer science , medicine , artificial intelligence , ophthalmology , operating system
Purpose This research aims to assess central and peripheral visual acuity in human. Methods We assume that visual acuity will decrease in peripheral vision because the density of human photoreceptor cone cells diminishes exponentially. We designed a program to measure visual acuity in two different models (minimum discernible, minimum separable) According to the distance between subject’s eye and screen, this program has 3 cases (basic, release, accumulate model), which are classified by position of nodal points. In addition, there is a selection of four different line patterns to define visual field. After all these options are selected, the program displays various‐sized circles (discernible model) and Landolt rings (separable model) on the locations of screen corresponding to the visual angle. Results Distribution of visual acuity according to the visual angle could be acquired by proposed method. Central visual acuity was nearly 20/20 and the peripheral visual acuity was diminished according to the increment of visual angle in normal volunteers. Conclusion Distribution of the visual acuity according to the visual angle corresponded to the density of the photoreceptor cone cells, not to the density of the rod cells. Developed program and system might be useful for other researches concerning visual acuity.