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November 1966

Corneal Contact Lenses: Large or Small?

Arch Ophthalmol. 1966;76(5):631-632. doi:10.1001/archopht.1966.03850010633001

A few years ago, the fitting of corneal lenses seemed a simple procedure. The contact lens diameter and peripheral curves were largely standardized. Although the fitting manuals of the various manufacturers did permit a small degree of flexibility in choosing the diameter, this was dictated by the width of the palpebral fissure and diameter of the cornea and pupil. The only parameters of a contact lens that varied were the central posterior curve and power, and these were determined by the "K" measurements and spectacle prescription. The conversion of the above measurements to a contact lens design required no more than one minute. If this was too great a burden for the busy practitioner, the manufacturers would gladly design the lens for him. Contact lens fitting by mail seemed an appropriate product of this remarkable era of computerized technology.

However pleased the practitioners and contact lens manufacturers may have been,

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