Another perspective on keratoconus contact lens fitting

Area of Science:

• Ophthalmology
• Optometry
• Corneal Disease

Background:

• Keratoconus is a progressive corneal ectasia characterized by thinning and irregular astigmatism.
• Contact lens fitting is crucial for visual rehabilitation in keratoconus patients.
• Existing fitting philosophies offer different approaches to managing keratoconus.

Purpose of the Study:

• To review major keratoconus contact lens fitting philosophies.
• To discuss a theory on the etiology of central corneal defects in keratoconus.
• To explore the implications of fitting philosophies on managing central defects.

Main Methods:

• Literature review of established keratoconus contact lens fitting strategies.
• Theoretical discussion on the pathogenesis of central corneal irregularities.
• Analysis of fitting implications based on proposed theories.

Main Results:

• Keratoconus fitting philosophies vary, with apical relationship being a key consideration.
• A theory regarding the cause of central defects in keratoconus is presented.
• Fitting implications are directly linked to the understanding of defect etiology.

Conclusions:

• Selective application of different fitting philosophies is recommended.
• Understanding the cause of central defects can guide contact lens selection.
• Optimizing keratoconus management requires a nuanced approach to fitting.