Analysis reveals the location of the corneal apex in normal eyes, suggesting considerations for contact lens fitting.
The position of the apex of the cornea was found for 1000 “normal” eyes (500 right; 500 left) from photoelectronic keratoscopic analysis. The corneal apex was located on the vertical meridian in 21.3% of the eyes, temporally in 62.4%, and nasally in 16.3%. Although a temporally biased location for the corneal apex was demonstrated, 62.2% of the eyes had the apex within 0.5 mm of the visual axis. The implications of these findings in contact lens fitting are discussed.
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Tomlinson et al. (1979) studied this question.
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