Intacs (Intracorneal Ring Segments)

Keratoconus is a condition where the cornea (outer curved transparent layer of the eye) thins and develops a more conical or irregular shape, which causes progressive near-sightedness (clear near vision and blurred far vision) or distortion of vision. As the condition worsens, it is difficult to provide correction with eyeglasses or contact lenses. Intacs or intracorneal ring segments (ICRS) are small plastic polymer implants shaped as crescents, which are inserted to reshape or flatten the cornea, and refocus the light rays for clear vision.

Intacs can be inserted through a surgical procedure that is performed on an outpatient basis, under light sedation and with anaesthetic drops. Your surgeon chooses the thickness of the implant depending on the severity of your condition. One or two implants are inserted into a curved tunnel created between the layers of the cornea either by laser or a special surgical instrument. The implant flattens the cornea to refocus light and correct distortions. The entire procedure takes about 15 minutes. Vision may improve immediately after the procedure or after a few days.

Mild cases of keratoconus may be successfully corrected with Intacs. In moderate to severe cases, Intacs are used in combination with contact lenses. The implants may be removed or replaced at a later stage if necessary.

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