näönkorjaustoimenpidettä

näönkorjaustoiminta is a Finnish term that translates to "vision correction surgery" in English. It encompasses a range of surgical procedures designed to improve or restore vision by correcting refractive errors of the eye. These errors, such as myopia (nearsightedness), hyperopia (farsightedness), and astigmatism, occur when the eye cannot properly focus light onto the retina.

The most common types of näönkorjaustoiminta include laser-assisted in situ keratomileusis (LASIK) and photorefractive keratectomy (PRK). LASIK involves creating a thin flap on the cornea, then using a laser to reshape the underlying tissue. PRK, on the other hand, removes the outermost layer of the cornea before laser treatment. Both procedures aim to alter the cornea's curvature to achieve sharper vision.

Other vision correction surgeries may involve intraocular lenses, such as phakic intraocular lenses (IOLs) implanted in front of the natural lens for severe refractive errors, or refractive lens exchange (RLE), where the natural lens is replaced with an artificial one. Cataract surgery, while primarily for cloudy lenses, also results in vision correction.

The goal of näönkorjaustoiminta is to reduce or eliminate the need for corrective lenses like glasses or contact lenses. Eligibility for these procedures depends on various factors including eye health, prescription stability, and corneal thickness. A thorough eye examination by an ophthalmologist is crucial to determine the most suitable surgical option for an individual's needs. The procedures are generally considered safe and effective, though like any surgery, they carry potential risks and require a period of recovery.