Application of a modified keratometer in the study of corneal topography on Chinese subjects.
A corneal topography study was carried out on Hong Kong Chinese subjects using a modified keratometer. The Chinese corneal topography measured by this modified keratometer was similar to other studies using the Wesley-Jessen Photo Electronic Keratoscopy (PEK) System 2000. The mean p-values along the horizontal meridian and the vertical meridian were 0.82 and 0.87, respectively. A negative correlation was found between the p-value and the central corneal radius along the horizontal meridian which may indicate that a steeper central cornea will have a greater p-value. However, the correlation coefficient of 0.56 was not too certain for this conclusion to be drawn. A difference of 0.04 was found between the horizontal p-value and the vertical p-value, which may be a result of the tight lid tension along the vertical meridian. This modified keratometer can be considered as an inexpensive instrument for the study of corneal topography.
Lam
A K
AK
Department of Optometry and Radiography, Hong Kong Polytechnic University.
Douthwaite
W A
WA
D000328:Adult; D002681:China / Q000208:ethnology; D003315:Cornea / Q000033:anatomy & histology*; D005260:Female; D006723:Hong Kong; D006801:Humans; D008297:Male; D009885:Ophthalmology / Q000295:instrumentation