Femtosecond Lenticule EXtraction
Encyclopedia
Femtosecond Lenticule EXtraction (FLEX) is a new form of refractive eye surgery
Refractive surgery
Refractive eye surgery is any 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 or cataract surgery. The most common methods today use excimer lasers to...

 similar to LASIK
LASIK
LASIK or Lasik , commonly referred to simply as laser eye surgery, is a type of refractive surgery for correcting myopia, hyperopia, and astigmatism...

 that creates a lenticule for removal and a cornea
Cornea
The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber. Together with the lens, the cornea refracts light, with the cornea accounting for approximately two-thirds of the eye's total optical power. In humans, the refractive power of the cornea is...

l flap. Flex uses a single femtosecond laser laser - compared with Lasik's two - to cut a lens-shaped layer from within the cornea and shape it to achieve improved patient vision.
The new treatment works better than Lasik for people with more severe myopia of up to 1,000 degrees. Additionally, the surgery is reversible in many cases, helping those who develop long-sightedness or presbyopia as they age.
Carl Zeiss Meditec
Carl Zeiss Meditec
Carl Zeiss Meditec AG is a multinational medical technology company. It manufactures tools for eye examinations and medical lasers as well as solutions for neurosurgery, dentistry, gynecology and oncology. Among its products are the most common tools used by ophthalmologists and optometrists.Carl...

, which is developing the procedure for its VisuMax laser, has reported good initial results.
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