INTACS (Intrastromal Corneal Ring Segments) For Corneal Ectasia

Use of asymmetrical corneal inserts to reduce or eliminate myopia and astigmatism in patients with keratoconus, who are no longer able to achieve adequate vision with their contact lenses or spectacles, so that their functional vision may be restored and the need for corneal transplantation may potentially be deferred.

Inclusion criteria

• 21 years of age, or older
• have experienced a progressive deterioration in their vision, such that they can no longer achieve adequate functional vision on a daily basis with contact lenses, or spectacles.
• have clear central corneas
• have a corneal thickness of 450 microns or greater at the proposed incision site
• have corneal transplantation as the only remaining option to improve their visual function

Exclusion criteria

• under 21 years of age
• have not experienced a progressive deterioration in their vision, such that they can no longer achieve adequate functional vision on a daily basis with contact lenses, or spectacles.
• do not have clear central corneas
• do not have a corneal thickness of 450 microns or greater at the proposed incision site
• do not have corneal transplantation as the only remaining option to improve their visual function