optical zone of cornea

(redirected from central corneal optical zone)

optical zone of cornea 

A theoretical zone of about 4 mm in diameter in the centre of the cornea. It is assumed to be spherical for clinical purposes. Syn. corneal cap. See corneal apex.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
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