Effect of retinopathy of prematurity on scotopic spatial summation.
Invest Ophthalmol Vis Sci
; 55(5): 3311-3, 2014 Apr 29.
Article
em En
| MEDLINE
| ID: mdl-24781938
ABSTRACT
PURPOSE:
To evaluate scotopic retinal organization in retinopathy of prematurity (ROP) through a study of spatial summation.METHODS:
Thresholds for a range of stimulus diameters (0.4°-10°) were measured using a two alternative, spatial, forced choice psychophysical procedure. The critical diameter (DCRIT) for complete summation was estimated in subjects with a history of severe ROP (N = 7) and mild ROP (N = 17). Subjects who were born preterm and never had ROP (N = 16) and term-born subjects (N = 7) were also tested. The subjects ranged in age from 9 to 17 (median 13.5) years.RESULTS:
Critical diameter for complete spatial summation was significantly larger in ROP subjects than in subjects who never had ROP and in term-born control subjects. Critical diameter varied significantly with severity of ROP.CONCLUSIONS:
The larger DCRIT values in ROP are consistent with altered organization of the post receptor retina. This may offer the ROP retina a strategy for achieving noise reduction and good dark-adapted visual sensitivity.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Percepção Visual
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Retinopatia da Prematuridade
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Células Fotorreceptoras Retinianas Bastonetes
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Adaptação à Escuridão
Limite:
Adolescent
/
Child
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Female
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Humans
/
Male
Idioma:
En
Revista:
Invest Ophthalmol Vis Sci
Ano de publicação:
2014
Tipo de documento:
Article
País de afiliação:
Estados Unidos