Vision errors, which are some of the most common eye abnormalities in the world, are caused due to changes in the length of the eyeball (longer or shorter), changes in the shape of the cornea, or age-related stiffness of the lens.In a normal eye, the cornea and lens are smooth and curved equally in all directions which allow light rays to focus sharply onto the retina, the light-sensitive surface at the back of the eye. This produces a clear image for the brain to process in an eye with refractive error, irregularly shaped cornea or lens prevents light from focusing properly onto the retina, causing blurred or distorted vision.
The main types of refractive errors are myopia (near-sightedness), hyperopia (farsightedness), presbyopia (loss of near vision with age) and astigmatism. While presbyopia affects most adults over the age of 40, other refractive errors can affect both children and adults. Refractive errors, when left uncorrected, can lead to irreversible decrease in vision in one eye or both eyes depending on the severity, especially in children.
Refractive corneal surgery and refractive lens surgery are the currently established surgical methods for the correction of refractive error. In refractive corneal surgery the cornea and/or the lens is modified with excimer laser techniques and incisional procedures to enable light to focus onto the retina at the back of the eye. In refractive lens surgery, phakic intraocular lenses (PIOL) and refractive lens exchange (RLE) are used to refocus light rays for sharpen vision.
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Custom laser vision correction at the hands of experienced surgeons, with advanced diagnostics equipment, a state-of-the-art OT complex, and meticulous postoperative care makes Narayana Nethralaya the best choice for your laser eye surgery. We have over 15 years of experience in managing complex, irregular corneas, and complicated cases.
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