LES Archives - Healthhype https://healthhype.com/tag/les Current Health Articles on Symptoms, Diseases and Treatment Wed, 20 Aug 2014 14:52:04 +0000 en-US hourly 1 https://healthhype.com/wp-content/uploads/logoicon.png LES Archives - Healthhype https://healthhype.com/tag/les 32 32 Corrective Laser Eye Surgery (LES): LASIK, LASEK, PRL, RLE https://healthhype.com/laser-eye-surgery.html https://healthhype.com/laser-eye-surgery.html#comments Mon, 21 May 2007 03:48:58 +0000 http://www.healthhype.com/laser-eye-surgery.html WHAT IS LASER EYE SURGERY? Refractive or Laser Eye Surgery (LES) is a laser reshaping of cornea that changes its focusing power (1), (Picture 1 and 2). For patients with moderate refractive errors, this ambulatory procedure is a quick way to get free of glasses or contact lenses. Picture 1. An eye doctor performing laser eye surgery (source: whmc.af.mil) COST OF LASER EYE SURGERY The cost of LES can vary widely but it is rarely under $1,000 per eye (2). REFRACTIVE ERRORS TO CORRECT WITH LES A light from the observed object penetrates through the cornea, lens and viscose liquid of the eye globe, refracts, and focuses on retina as an image. In farsightedness – hyperopia, the eye globe is too short, and since the lens can not refract the light from near objects enough, the light will fall behind the retina resulting in a blurred image. In presbyopia (farsightedness of the aged) the lens becomes rigid and can not refract the light from near objects efficiently, so it will again focus behind the retina. In nearsightedness (myopia), the eye globe is too long and light from distant objects will focus in front of the retina, so images of distant objects will be blurred. In astigmatism blurred vision is caused by irregularities in the corneal or [...]

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