A<unk>  (also called an intracorneal implant) is a device which is surgically implanted in the cornea of the eye as a treatment for presbyopia. Successful installation results in reducing dependence on reading glasses, so that the user can more easily engage in everyday tasks such as using a mobile phone, reading store shelf prices and working on a computer.<unk> s are small, thin, and permeable. Typically one is implanted in the non-dominant eye. Jose Barraquer created the first<unk>  prototype in 1949 in Barcelona, Spain. The flint glass material which he used, however, was found to be unsuitable because of biocompatibility issues. Other transparent, permeable materials were tested, including hydrogel polymers in the 1960s. Some early<unk>  recipients experienced complications, such as corneal opacification, thinning and melting. Researchers soon found that, as well as the material, the thickness of the<unk>  and the depth at which it was implanted were important, as well as permeability and centration. There was a delay in the general introduction of the treatment while considerable research was done to find safe and reliable combinations of these factors. The US FDA approved the KAMRA<unk>  in April 2015. The<unk> s are in commercial use in US, some countries in Europe, Asia-Pacific, the Americas and the Middle East. The<unk> s are implanted into the cornea either in a laser-created corneal pocket or lamellar corneal flap (similar to LASIK). The<unk> s can be removed should the patient develop another condition requiring medical treatment.
Corneal inlay
Pre-Descemet's Endothelial Keratoplasty
Comedo extraction
Intrastromal corneal ring segment
Artificial iris
Epi-LASIK
Eyepatch
Antimonial cup