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Ectasia refers to distention or weakening of the cornea. This results in progressing, blurred, distorted vision that may not be correctable with glasses or contact lenses and may, rarely, require a corneal transplant. Ectasia can occur naturally as a disease of the cornea, called keratoconus. If patients have keratoconus, they are not candidates for Laser Vision Correction. Ectasia can, also, develop following Laser Vision Correction in approximately 1/2000 cases of LASIK. Ectasia is mostly avoidable if patients are screened appropriately pre-op to make sure the corneas have adequate corneal tissue and structural integrity to safely tolerate LASIK. Ectasia is more common in younger patients under the age of 30. Ectasia is less common with PRK than LASIK. I typically recommend PRK for patients under age 30 to avoid the risk of ectasia.

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