Patients who suffer from presbyopia resort to reading glasses and bifocals to see objects at near distances. Traditional IOLs do not correct for presbyopia, so cataract surgery patients need to wear bifocals or reading glasses for near vision. Multifocal intraocular lenses like the AMO Tecnis Multifocal IOL provides a permanent and effective solution for presbyopia patients with cataracts. By providing a stable, multifocal, artificial lens for the cataract patient that also corrects for the symptoms of presbyopia, AMO Tecnis can vastly improve vision in older adults. About 85% of patients with the Tecnis Multifocal lens are able to function at all distances without glasses.
TECNIS™ Multifocal Lens
During the surgery procedure the lens is inserted through a tiny incision in the eye. This surgery follows the same cataract surgery process used with other lens implants known as phacoemulsification. During this procedure the natural crystalline lens is broken up using ultrasonic waves. The crystalline lens is the part of the eye behind the cornea that can thicken over time and become cloudy, forming cataracts that obstruct vision. During the procedure, the unhealthy crystalline lens is broken up into minute fragments and the tiny pieces are then vacuumed away. The next process involves the insertion of the TECNIS™ multifocal IOL. The lens is inserted through a small incision in the eye and unfolds into the appropriate position. This new lens will ultimately correct both nearsightedness and farsightedness.
Toric intraocular lenses (IOLs) are designed to treat cataract patients who also suffer from astigmatism, a condition where the front surface of the eye ball is not spherical. Astigmatism results in blurry vision which is generally worse at distance than at near. Toric IOLs work by correcting for both spherical and cylindrical visual aberrations. Spherical aberrations are the cause of common refractive errors such as myopia and hyperopia. Cylindrical aberrations are the cause of astigmatism. Generally, these lenses are slightly more difficult to implant than other IOLs because they require very precise angular placement within the eye. Toric IOLs are the single most effective way of correcting astigmatism in patients who have undergone cataract surgery.
Verisyse™ Phakic IOLs
The Verisyse™ Phakic intraocular lens implant is used to correct moderate to severe myopia (nearsightedness). The lens is placed behind the cornea and in front of the iris of the eye. A Verisyse™ Phakic IOL acts as a secondary focusing lens which precisely focuses images on the retina. The term “phakic” refers to the fact that the existing crystalline lens of the eye remains in the eye at the conclusion of the procedure. Although Verisyse™ IOLs are designed to be permanent replacement lenses, the procedure is reversible because the natural lens of the eye is left intact.