Post-LASIK ectasia

Post-LASIK ectasia is a rare but serious complication that can occur after LASIK surgery. It is characterized by a progressive thinning and bulging of the cornea, which can lead to vision loss.

Etiology

The exact cause of post-LASIK ectasia is not fully understood. However, it is believed to be related to the weakening of the corneal structure following the removal of corneal tissue during LASIK surgery. Other risk factors may include a pre-existing condition known as keratoconus, high myopia, and a thin or irregular cornea.

Symptoms

Symptoms of post-LASIK ectasia may not appear until months or even years after the LASIK procedure. They can include progressive myopia, irregular astigmatism, and an increase in higher-order aberrations. These symptoms can result in blurred or distorted vision, increased sensitivity to light, and difficulty seeing at night.

Diagnosis

Diagnosis of post-LASIK ectasia is typically made through a comprehensive eye examination, including corneal topography and pachymetry. These tests can help to identify changes in the shape and thickness of the cornea that are characteristic of ectasia.

Treatment

Treatment options for post-LASIK ectasia are limited and can depend on the severity of the condition. They may include the use of rigid gas permeable contact lenses to improve vision, collagen cross-linking to strengthen the cornea, or in severe cases, a corneal transplant.

Prevention

Prevention of post-LASIK ectasia involves careful patient selection for LASIK surgery, including thorough preoperative screening to identify potential risk factors. In patients with a high risk of developing ectasia, alternative refractive surgery procedures may be considered.

See also

• LASIK
• Keratoconus
• Corneal topography
• Pachymetry