title: Corneal shape of Hong Kong-Chinese.
abstract: Corneal asphericity (the p-value, p) and apical corneal radius (r0) were calculated for 63 Hong Kong-Chinese (39 male and 24 female), using the Topographic Modeling System (TMS-1). The values of p and r0 in, and between, the two principal meridians were compared, and the effects of refractive error and gender were also investigated. The mean +/- SD r0 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 r0 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 r0 and in p. There was no correlation between p and r0 along the two principal meridians. p was not significantly correlated to the refractive error but r0 was. Our results agree with previous findings that while males have longer r0 than females, their p are not significantly different.
authors.affiliation: Department of Optometry and Radiography, Hong Kong Polytechnic University, Hung Hom, Hong Kong.
authors.forename: S W
authors.initials: SW
authors.lastname: Cheung
authors.forename: P
authors.initials: P
authors.lastname: Cho
authors.forename: W
authors.initials: W
authors.lastname: Douthwaite
mesh_terms: D002681:China / Q000208:ethnology; D019781:Corneal Topography; D005260:Female; D006723:Hong Kong; D006801:Humans; D007090:Image Interpretation, Computer-Assisted; D008297:Male; D012030:Refractive Errors / Q000208:ethnology; D012737:Sex Factors