Color perception on Ishihara plates with red lenses in subjects with low vision due to retinal diseases.
Indian J Ophthalmol
; 71(11): 3534-3538, 2023 11.
Article
em En
| MEDLINE
| ID: mdl-37870020
ABSTRACT
Purpose:
This study aimed to evaluate color perception (CP) changes on Ishihara plates following red-tinted contact lenses in subjects with low vision (LV) from retinal diseases.Methods:
A cross-sectional observational study without control involved 84 subjects, aged 20-70 years, having LV from retinal diseases to examine CP changes following wearing red-tinted contact lenses. The subjects viewed Ishihara plates, with each eye separately, before and after wearing red lenses in two categories "plates 1-21" and "plates 22-25". Change in CP with the use of a red lens was the primary outcome measure.Results:
There was a significant increase in the number of plates read in both categories, that is, plates 1-21 (P = 0.002) and plates 22-25 (P = 0.032), the latter being used to diagnose the red-green defects. Although 70 eyes could read both digits on plates 22-25 and appeared to have normal color vision (CV) at baseline, this number rose to 99 eyes following the use of red-tinted lenses. There was a significant change in the type of CP (red defect/green defect/normal/undefined defect) (P = 0.022) with the application of a red-tinted lens.Conclusions:
The use of red-tinted lenses caused a significant increase in the number of plates read, increased the number of subjects who appeared normal on plates 22-25, and significantly changed CP of LV subjects. These lenses can be a valuable aid for LV subjects. Although Ishihara plates can diagnose only red-green defects, further studies on CV testing techniques that detect both red-green and blue-yellow CV defects are recommended.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Doenças Retinianas
/
Defeitos da Visão Cromática
/
Baixa Visão
/
Visão de Cores
Limite:
Humans
Idioma:
En
Revista:
Indian J Ophthalmol
Ano de publicação:
2023
Tipo de documento:
Article
País de afiliação:
Índia