Intraocular Lens Treatment in Turkey
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Intraocular Lenses Used in Cataract and Clear Lens Surgery
Our natural lens inside our eyes has a refractive index of +10 degrees. Our natural lens adapts when we look up close until the forties and gains 3 degrees for far distance. At the age of forties, we start to lose our adaptive reflex and wear glasses for near vision when we look up close. The condition that our natural lens loses its transparency is called a cataract. When the cataract is surgically removed, our eyes will be deprived of 10 degrees in the far distance and 13 degrees in the near distance vision. Therefore, in cataract surgery, intraocular lenses are placed in the eye with the features needed by the eye.
How many types of intraocular lenses are there?
- Lenses that have only one focus are called monofocal, or unifocal lenses. Since these lenses do not provide a solution to astigmatism, they aim to show the distance without glasses in people with low astigmatism. Patients with single vision lenses need +2.25 dioptre glasses to be able to read
- Monofocal lenses that also correct astigmatism are called toric monofocal lenses. These patients also need +2.25 dioptre glasses for near-distance vision
- The newest type of monofocal, monofocal (+) lenses give some support not too close but at an intermediate distance. They specifically aim to show step distance and tabletop
- Lenses with increased depth of focus (EDOF) also give good support at medium distances, but not at very close distances. They especially aim to show mobile phones and computer
- Lenses that have a far and a near focus are called bifocal lenses. These lenses show far and near distances together. Near distance is clear only at a certain distance
- Today, the most common and preferred lenses are trifocal lenses. Because with these lenses, you can see not only at a near distance but also at a distance of 40-80 cm.