Variations of Cup-to-Disc Ratio in Children

Abstract

Purpose: The aim of this study is early detection of increased cup to disc ratio and a survey study of cup-disc ratio in Egyptian children age group less than 15 years. Methods: Three hundred and eighty-two (382) children were enrolled in this study. They were classified into three age groups; infants’ Group (1) from 0 - 2 years, preschool Group (2) from 2 - 6 years and school children Group (3) from 6 - 15 years old. C/D ratio was measured for each child. Results: In Group (1), normal C/D ratio ranged from 0 to 0.1. The C/D ratio > 0.3 or a binocular difference of >0.2 could be regarded as one of the criteria of newborn glaucoma. Group (2): the normal ratio ranged from 0.1 - 0.2. Group (3): the normal ratio ranged from 0.2 - 0.3. The highest ratio 0.7 was found in two eyes.