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Are some corneas too thin for successful LASIK surgery?

Most normal corneas are 520 to 550 microns thick. A micron is 1/1000th of a millimeter, so a normal cornea is a little over half of a millimeter in thickness. Corneas under 500 microns have an increased risk of developing problems postoperatively that may lead to decreased vision or even further surgery. The same is true for corneas with less than 300 microns of posterior corneal thickness after surgery. Other options such as PRK (photorefractive keratectomy), LASEK (laser epithelial keratomileusis), implanted corneal ring segments, CK (conductive keratoplasty), or phakic IOL's (surgically implanted contact lenses) may be considered in some patients who do not have enough corneal thickness to consider LASIK. Ask your eye doctor which surgical procedure would be best for you.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.