Anatomy of the Lens Anatomy of the human lens, which becomes the cataract as we age. Source Cataracts are the most common cause of blurry vision in patients over the age of 55. Although glasses can compensate for the loss of vision for a while, eventually surgery will be needed to restore clarity. This surgery involves the removal of the lens, a structure found behind the iris that is densely packed with cells contained inside a bag known as a capsule. This capsule is suspended by little filaments called zonules that are attached to the ciliary body, a muscle that produces aqueous. These filaments allow the lens to bend and flex in order to focus on objects at different distances.
cataract surgery multifocal lens pros and cons 2018An accommodating intraocular lens IOL device adapted for implantation in the lens capsule of a subject's eye, the IOL device comprising. an anterior portion comprising a refractive optical element; an elastic posterior portion; and an enclosed cavity defined between the anterior and posterior portions; wherein the cavity is configured to contain a volume of fluid to space apart the anterior and posterior portions; wherein the posterior portion is configured to contact a posterior area of the lens capsule adjoining the vitreous body at least in the area at and surrounding the optical axis when the IOL device is implanted in the eye and the cavity contains the fluid; and wherein the posterior portion actuates in response to an anterior force exerted by the vitreous body, causing the fluid to exert a deforming or displacing force on the refractive optical element. The accommodating IOL device of claim 1, wherein the refractive optical element increases its degree of curvature in response to the anterior force and decreases its degree of curvature in the absence of the anterior force. The accommodating IOL device of claim 2, wherein the refractive optical element is resiliently biased to having a degree of curvature that is substantially equal to the degree of curvature of the anterior portion of the subject's natural lens capsule. The accommodating IOL device of claim 1, wherein the IOL device is biased to a configuration having a width that is substantially equal to the width of the unaccommodated natural lens capsule along the optical axis. The accommodating IOL device of claim herein the IOL device has an equatorial diameter that is substantially equal to the equatorial diameter of the subject's natural lens capsule in the unaccommodated state.
crystalens reviews 2017
Reviewed by Vance Thompson, MD Crystalens and Trulign Toric are premium intraocular lenses IOLs that correct presbyopia as well as common refractive errors , enabling an expanded range of clear vision and a decreased need for eyeglasses after cataract surgery, compared with surgery performed with conventional monofocal IOLs. This is why they are classified as "accommodating IOLs.
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