Tekia accommodating intraocular lens

02-Apr-2020 16:23 by 10 Comments

Tekia accommodating intraocular lens

An accommodating intraocular lens (AIOL) 100 comprises: an optic 200 coupled to at least one haptic 300 such that the optic 200 is biased with respect to the haptic 300.The AIOL 100 is placed into the capsular bag of a patient's eye after cataract surgery via known techniques such as, for example, phacoemulsification.

The movement of the optic enables the patient implanted with the lens to automatically change their vision between far, intermediate and near. Those having ordinary skill in the art may be able to make alterations and modifications to what is described herein without departing from its spirit and scope.The best visual acuity is achieved with the single focus accommodating lenses.The optic of these lenses moves forward and backward upon constriction and relaxation of the ciliary muscle.These lenses frequently de-centered and dislocated and it was discovered that there was a need to center and fixate the lens optic in the vertical meridian of the eye.Attachments to the optic that center and fixate the lens within the capsular bag are called haptics.An accommodating IOL (AIOL) permits refocusing of the eye by means of movement along the optical axis in response to the constriction or relaxation of ciliary muscles. The accommodating intraocular lens may have an optic coupled to a plate haptic via a member that substantially promotes the optic's response to a vitreous pressure change.

Near vision results from a forward movement of the optic upon constriction of the ciliary muscle which increases the pressure in the posterior part of the eye with a simultaneous decrease in pressure in the anterior part of the eye. Other features and advantages of the present invention will become apparent from the following more detailed description, taken in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of the presently described apparatus and method of its use.

Traditionally, haptics consist of multiple flexible loops of various designs, J loops, C loops, closed loops and flexible radial arms. 5,496,366, to Cumming, herein incorporated by reference in its entirety.

Recently, traditional haptics have been replaced in some lens designs with oblong, flat flexible plates, called plate haptics. And although current AIOLs provide patients with significantly restored distance and intermediate vision, adequate near vision is commonly lacking—often requiring that patients use weak reading glasses to enhance near vision.

The lens is centered so that the optical axis of the lens coincides with that of the patient's eye.

The haptics 300 contact the capsular bag and the natural fibrosis of the tissue secures the haptics 300, and consequently the AIOL 100, in place.

These plate haptics usually made from silicone, are solid, flat, flexible and between 3.0 and 6.0 mm in width, 0.20 to 0.75 mm thick, and may have tapered, rounded or parallel sides. Multi-focal and toric lens solutions suffer from the disadvantages identified above.

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