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Corneal shape of Hong Kong‐Chinese ⋆
Author(s) -
Cheung Sinwan,
Cho Pauline,
Douthwaite William
Publication year - 2000
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1046/j.1475-1313.2000.00488.x
Subject(s) - meridian (astronomy) , ophthalmology , refractive error , mathematics , mean value , corneal topography , cornea , physics , optics , medicine , eye disease , statistics , astronomy
Summary Corneal asphericity (the p ‐value, p ) and apical corneal radius ( r 0 ) were calculated for 63 Hong Kong‐Chinese (39 male and 24 female), using the Topographic Modeling System (TMS‐1). The values of p and r 0 in, and between, the two principal meridians were compared, and the effects of refractive error and gender were also investigated. The mean±SD r 0 and p along the flattest meridian of the right eye were 7.82±0.26 mm and 0.78±0.12 respectively. The mean±SD r 0 and p along the steepest meridian of the right eye were 7.64±0.26 mm and 0.83±0.15 respectively. Meridional variations were found in r 0 and in p . There was no correlation between p and r 0 along the two principal meridians. p was not significantly correlated to the refractive error but r 0 was. Our results agree with previous findings that while males have longer r 0 than females, their p are not significantly different.