Gene Therapy for Visual Impairment

Gene Therapy for Visual Impairment

Gene Therapy for Visual Impairment

In modern society where most people are educated, eyesight problems inevitably proliferate, due to the fact that they have spent more time in reading. TV and computers are also incentives of the skyrocketed eyesight problems. Owing to the invention of eyeglasses and contact lenses, people with nearsightedness, farsightedness, astigmatism and presbyopia are able to view a clear world as well. Additionally, fast developed, eyeglass manufactures achieve advancement in glare reduction and unwanted wavelengths of light elimination, etc..

However, eyeglasses and contacts can not serve as helps for vision improvement of people suffering from eye diseases, such as Macular Degeneration and Diabetic Retinopathy, etc.. Recently, a medical treatment is developed, which is also able to treat visual impairments. Avastin is a drug that was originally used in Colo-rectal cancer treatments, but is found to have an ability to improve the vision in patients with Macular Degeneration, Diabetic Retinopathy and other vascular related retinal diseases. What's more, many other new drugs are brought about in succession as well, for example, the non steroidal anti inflammatory drugs can reduce retinal inflammation and cyst formations.

There are some people whose eye diseases arise from within the patients, genetic and congenital disorders. They pose a great challenge to eye doctors and surgeons. Luckily, gene therapy is found to be able to dramatically improve those patients' vision. The procedure is performed at the Scheie Eye Institute in Philadelphia and the patients formerly suffering from Leber's Congenital Amaurosis claim that he could read letters on an eye chart already after such a procedure. Then the news was published in the New England Journal of Medicine, on which the cause of Leber's Congenital Amaurosis and how the surgery achieves an success are recorded. It is stated that a lack of RPE 65 gene prevents protein production which is required for the retinal tissue to absorb and process the light into vision. A normal RPE is injected in the gene therapy to restore the protein production. After two weeks, the patients can mostly view more clearly than they did before. Possible complications of gene therapy include sensitivity to light.

In spit that it is just a successful case of Leber's Congenital Amaurosis treatment, it gives hopes to other eye diseases originated from gene disorders. Researches concerned are under procession. The application of gene therapy in visual impairment will be a great success in the near future.

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