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Semi Scleral Contact Lenses, Looking Towards Our Roots For Answers To New Challenges
By: Steve Cogger
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Advances in gas permeable materials and lens manufacturing techniques have allowed certain labs to manufacture corneo-scleral contact lenses. These lenses fit over the entire cornea and rest on the sclera, similar to a soft lens. Diameters can range from 13.0 to 15.0mm, a fenestration provides for easy removal on these larger diameter lenses.
Corneo-scleral and semi-scleral lenses provide great options for irregular corneas such as keratoconus, pellucid marginal degeneration, post PK, and post trauma to name a few. They are also a fantastic option for those that could not previously tolerate contact lenses. In most cases, patients who were intolerant of other lens modalities report longer wear time, increased comfort and more consistent vision when properly fit with semi-scleral lenses.
Imagine the vision of a gas permeable lens with the comfort of a soft lens. That's exactly what we have in mind when fitting semi-scleral lenses.
I have had a huge success fitting corneo-scleral lenses and am always excited to offer this fitting service to our patients.
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Steve Cogger is a contact lens specialist from New York City and a fellow of the Contact Lens Society of America. In order to provide a resource for all lens wearers, he is also the webmaster of http://www.All-About-Contact-Lenses.com |
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