While<unk>  is becoming more affordable and safe, it may not be recommended for everybody. People with certain eye diseases involving the cornea or retina, pregnant women, and patients who have medical conditions such as glaucoma, diabetes, uncontrolled vascular disease, or autoimmune disease are not good candidates for<unk> . Keratoconus, a progressive thinning of the cornea, is a common corneal disorder. Keratoconus occurring after<unk>  is called Corneal Ectasia. It is believed that additional thinning of the cornea via<unk>  may contribute to advancement of the disease that may lead to the need for a corneal transplant. Therefore, keratoconus is a contraindication to<unk> . Corneal topography and pachymetry are used to screen for abnormal corneas. Furthermore, some people's eye shape may not permit effective<unk>  without removing excessive amounts of corneal tissue. Those considering laser eye surgery should have a full eye examination. Although the risk of complications is decreasing compared to the early days of<unk> , there is still a small chance for serious problems. These include vision problems such as ghosting, halos, starbursts, double-vision, and dry-eye syndrome. With procedures that create a permanent flap in the cornea (such as LASIK), there is also the possibility of accidental traumatic flap displacement years after the surgery, with potentially disastrous results if not given prompt medical attention. For patients with strabismus, risks of complications such as diplopia and/or increased strabismus angle need to be evaluated carefully. In case both<unk>  and strabismus surgery are to be performed, it is recommended that the<unk>  be done first.
Refractive surgery
Boston keratoprosthesis
Minimally invasive glaucoma surgery
Pre-Descemet's Endothelial Keratoplasty
Phototherapeutic keratectomy
Corrective lens
Eyelid revision
Laser thermal keratoplasty