Development of a ciliary muscle driven accommodating intraocular lens dating websites mississauga
An accommodating intraocular lens to be implanted within the natural capsular bag of a human eye from which the natural lens matrix has been removed through an anterior capsulotomy in the bag circumferentially surrounded by a capsular remnant. 1992, now abandoned, which is a continuation-in-part of application Ser. The invention relates also to a novel method of utilizing the intraocular lenses in a human eye to provide the patient with accommodation capability responsive to normal ciliary muscle action. Prior Art The human eye has an anterior chamber between the cornea and the iris, a posterior chamber behind the basis containing a crystalline lens, a vitreous chamber behind the lens containing vitreous humor, and a retina at the rear of the vitreous chamber.During a postoperative healing period following surgery,... 5,476,514, which is a continuation-in-part of application Ser. The crystalline lens of a normal human eye has a lens capsule attached about its periphery to the ciliary muscle of the eye by zonules and containing a crystalline lens matrix.This procedure produce in the anterior capsule a generally archway-shaped envelope capsulotomy centered on the axis of the eye.The capsulotomy is bounded at its bottom by the horizontal incision, at one vertical side by the vertical incision, at its opposite vertical side by the second vertical incision of the anterior capsule, and at its upper side by the upper arching portion of the capsule tear.Examples of such lenses are described in the following U. As is evident from the above patents, intraocular lenses differ widely in their physical appearance and arrangement. Such intracapsular and extracapsular procedures are prone to certain post-operative complications which introduce undesirable risks into their utilization.This invention is concerned with intraocular lenses of the kind having a central optical region or optic and haptics which extend outward from the optic and engage the interior of the eye in such a way as to support the optic on the axis of the eye. Among the most serious of these complications are opacification of the posterior capsule following extracapsular lens extraction, intraocular lens decentration, cystoid macular edema, retinal detachment, and astigmatism.After fibrosis is complete, natural brain-induced contraction and relaxation of the ciliary muscle relaxes and stretches the fused remnant and increases and reduces vitreous pressure in the eye to effect vision accommodation by the fused remnant, the posterior capsule, and vitreous pressure. The human eye possesses natural accommodation capability.
One of the more common of these disorders involves progressive clouding of the natural crystalline lens matrix resulting in the formation of what is referred to as a cataract.
Yet another capsulorhexis procedure, referred to as a beer can or can opener capsulorhexis, involves piercing the anterior capsule of the natural lens capsule at a multiplicity of intersecting positions along a circular line substantially coaxial with the axis of the eye and then removing the generally circular portion of the capsule circumferentially surrounded by the line.
This procedure produces a generally circular capsulotomy substantially coaxial with the axis of the eye and bounded circumferentially by an annular remnant or rim of the anterior capsule.
Other non-accommodating lenses have bifocal optics which image both near and distant objects on the retina of the eye.
The brain selects the appropriate image and suppresses the other image, so that a bifocal intraocular lens provides both near vision and distant vision sight without eyeglasses.
Search for development of a ciliary muscle driven accommodating intraocular lens:
It is now common practice to cure a cataract by surgically removing the cataractous human crystalline lens and implanting an artificial intraocular lens in the eye to replace the natural lens. 5,047,051, which was filed concurrently with my earlier mentioned application Ser. 07/515,636, discloses an intraocular lens having a haptic anchor plate, an optic at the longitudinal center of the plate, and resilient haptic loops staked to the ends of the plate.