Age norms for monocular grating acuity measured by sweep-VEP in the first three years of age

Arquivos Brasileiros de Oftalmologia

Solange Rios Salomão²  Fabio Ejzenbaum¹  Adriana Berezovsky¹  Paula Yuri Sacai¹  Josenilson Martins Pereira¹ 

[1] ,Universidade Federal de São Paulo Departamento de Oftalmologia São Paulo SP ,Brasil

关键词: Evoked potentials;    visual;    Visual acuity;    Vision tests;    Predictive value of tests;    Reference values;    Potenciais evocados visuais;    Acuidade visual;    Testes visuais;    Valor preditivo dos testes;    Valores de referência;   

DOI  :  10.1590/S0004-27492008000400002

来源: SciELO

【 摘 要 】

PURPOSE: To determine age norms for grating visual acuity and interocular acuity differences measured by the sweep-visually evoked potentials (VEP) technique in the first three years of life. METHODS: Monocular grating visual acuity was measured using the sweep-VEP in 67 healthy normal infants and children in the first 36 months of life. RESULTS: Sweep-VEP grating acuity ranged from 0.80 logMAR (20/125 Snellen equivalent) in the first month of life to 0.06 logMAR (20/20 Snellen equivalent) at 36 months of age. Lower normal limits (95th percentile limit) ranged from 0.95 logMAR (20/180) to 0.12 logMAR (20/25) with a progression of approximately 3 octaves in the first 36 months of age. The largest acceptable interocular acuity difference for clinical purposes was 0.10 logMAR. CONCLUSIONS: Age norms for grating acuity along with interocular acuity differences were determined using the sweep-VEP technique. These norms should be incorporated in clinical practice for precise diagnosis of visual status in infants and preverbal children.

【 授权许可】

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