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As with other forms of refractive surgery, keratoconjunctivitis sicca, colloquially referred to as 'dry eye,' is the most common complication of PRK, and can be permanent. In more advanced cases, recurrent erosions occur during sleeping from adherence of the corneal epithelium to the upper eyelid with rapid eye movement .
Refractive surgery is an optional eye surgery used to improve the refractive state of the eye and decrease or eliminate dependency on glasses or contact lenses. This can include various methods of surgical remodeling of the cornea ( keratomileusis ), lens implantation or lens replacement.
From 2 to 10 years post-operatively 43% of eyes had an increase in farsightedness by 1.00D or more. Despite this, 70% of patients reported not requiring corrective lenses for distance vision 10 years after surgery. [6]
Clear lens extraction, also known as refractive lensectomy, custom lens replacement or refractive lens exchange is a surgical procedure in which clear lens of the human eye is removed. Unlike cataract surgery , where the cloudy lens is removed to treat a cataract , clear lens extraction is done to surgically correct refractive errors such as ...
ReLEx Small incision lenticule extraction (SMILE), second generation of ReLEx Femtosecond lenticule extraction (FLEx), is a form of laser based refractive eye surgery developed by Carl Zeiss Meditec used to correct myopia, and cure astigmatism.
The surgeon then passes the microkeratome completely over the eye making the power cut. After the power cut, the corneal flap is laid back over the eye where it reattaches. ALK is a technique used to correct very high levels of myopia and is generally used from -5.00 to -18.00 diopters of nearsightedness.
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