Therapeutic contact lenses are specialized lenses that are designed to serve specific medical purposes beyond basic vision correction. Unlike conventional contact lenses, therapeutic lenses incorporate unique properties and technologies to directly treat eye diseases and conditions. Over the past decade, the advent of these advanced lenses has opened up new possibilities for improving eye health and managing ocular disorders.
Types of Therapeutic Contact Lenses
Gas Permeable Contact Lenses
Therapeutic Contact Lenses of the earliest forms of therapeutic lenses are rigid gas permeable contact lenses. Due to their high oxygen permeability, these lenses allow sufficient oxygen to reach the cornea and prevent complications in conditions like keratoconus that cause the cornea to thin and bulge irregularly. Rigid gas permeable lenses mold tightly to the protruding surface, provide rigid support, and help preserve corneal shape in keratoconus patients.
Bandage Contact Lenses
Bandage contact lenses serve to protect and promote healing of injured or diseased eyes. Made from highly oxygen permeable materials, these thick rigid lenses cover and shield damaged areas of the cornea. They aid in re-epithelialization after surgeries or corneal infections/ulcers by maintaining a moist environment and sealing out external irritants. Various types of bandage lenses exist for different clinical scenarios.
Scleral Contact Lenses
Scleral lenses are some of the largest contact lenses available, vaulting over the entire sclera or white part of the eye rather than just the cornea. They are primarily used for conditions that cause severe surface irregularities preventing fitting of other lenses. Scleral lenses can effectively manage disorders like severe dry eye, Steven Johnson Syndrome, ocular cicatricial pemphigoid by sealing the ocular surface and supplying consistent moisture.
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