Corneal shape of Hong Kong-Chinese

Sin Wan Cheung, Hie Hua Wong, William Douthwaite

Research output: Journal article publicationJournal articleAcademic researchpeer-review

46 Citations (Scopus)


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 r0in, and between, the two principal meridians were compared, and the effects of refractive error and gender were also investigated. The mean ± SD r0and p along the flattest meridian of the right eye were 7.82 ± 0.26 mm and 0.78 ± 0.12 respectively. The mean ± SD r0and 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 r0and in p. There was no correlation between p and r0along the two principal meridians. p was not significantly correlated to the refractive error but r0was. Our results agree with previous findings that while males have longer r0than females, their p are not significantly different. (C) 2000 The College of Optometrists.
Original languageEnglish
Pages (from-to)119-125
Number of pages7
JournalOphthalmic and Physiological Optics
Issue number2
Publication statusPublished - 15 Mar 2000

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • General Health Professions


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