Optical correction

Abstract

The present disclosure describes compositions which improve visual acuity and to methods for their use.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]The present application claims the benefit of and priority to British Patent Application No. 0724558.2, filed in the United Kingdom on Dec. 15, 2007, the entire disclosure of which is incorporated herein by reference.BACKGROUND[0002]1. Technical Field[0003]The present invention relates to topical compositions to improve visual acuity and to methods for their use. More particularly, but not exclusively, it relates to eye-drops and the like to ameliorate the effects of presbyopia, myopia, hypermetropia. astigmatism and combinations thereof.[0004]2. Background of Related Art[0005]One prevalent form of visual defect is presbyopia, in which the lens of the eye becomes relatively rigid, particularly with age, so that it becomes increasingly difficult to focus. This leads to eyestrain, and ultimately to recession of the near point, such that a sufferer of presbyopia may be unable to read or work on objects at arm's length.[0006]The conventional r...

AI Technical Summary

Benefits of technology

[0017]In addition, the present disclosure describes methods for improving visual acuity and also methods for treating a variety of eye disorders. Some non-limiting examples of the eye disorders include presbyopia, myopia, hypermetropia, astigmatism, and combinations thereof.

[0018]In embodiments, a method for improving visual acuity is disclosed which includes administering a first active agent containing a parasympathetic agonist to an eye, and then administering a second active agent selected from the group cons

Problems solved by technology

One prevalent form of visual defect is presbyopia, in which the lens of the eye becomes relatively rigid, particularly with age, so that it becomes increasingly difficult to focus.

This leads to eyestrain, and ultimately to recession of the near point, such that a sufferer of presbyopia may be unable to read or work on objects at arm's length.

However, since this will probably also move the wearer's far point closer, sacrificing their distance vision, reading glasses must usually be removed for driving, for example.

However, the field covered by the lenses may not be sufficient for all purposes.

Again, the restricted field covered by the “reading” portion of the lens may not be satisfactory, and many people cannot get used to bifocal lenses.

Bifocal lenses are usually more expensive than standard lenses.

Furthermore, many people dislike wearing any form of spectacles for reasons of comfort or for reasons of personal style.

Contact lenses have been proposed that are