Many new guidelines and procedures have been recommended in the fitting of rigid, gas-permeable contact lenses (RGPCL) to assure both comfort and corneal integrity. One of these, Humphrey's Autofit program, was determined to produce a contact lens design that fit parallel to the cornea. A RGPCL fit with apical clearance was found not to affect corneal integrity, yet to ensure comfort, the appropriate peripheral curve design was essential. This design was found not to be proportional to corneal shape.
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