Category: Vitamin A

Night Blindness Improved by Transplanted Photoreceptor Cells in Animal Experiment

Night visionTransplanting light-sensitive photoreceptor cells into mice with night blindness resulted in improved night vision. Night blindness means seeing poorly in the darkness, but seeing normally when there is enough light. In this groundbreaking research, scientists injected light-sensitive photoreceptor cells into night-blind mice’s eyes. After this treatment, the animals were able to see well enough to navigate a water maze and swim toward a visual cue in dimly lit conditions. Controls who did not receive the treatment were unable to efficiently navigate the maze.

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Stargardt’s Disease Vitamin A Contraindication

vitamin a contraindicated for Stargardts diseaseShould you take extra Vitamin A if you have Stargardt’s Disease? Vitamin A supplementation is frequently recommended for certain eye diseases (AMD and Retinitis Pigmentosa, for example). This nutrient is crucial for rebuilding photoreceptors cells and proper retinal functioning. However, a study on mice published in “Investigative Ophthalmology and Visual Science” indicated that Stargardt’s Disease patients may be damaged by taking Vitamin A.

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Breakthrough Prosthetic Sends Retina Signals to Brain to Restore Sight

blind mice had their vision restorated with new technologyBreakthrough research into vision restoration may result in a new type of prosthetic for people suffering from vision loss due to retinal degenerative diseases such as macular degeneration and retinitis pigmentosa.

Researchers cracked the retinal code that the retina uses to communicate with the brain. Their initial research was on mice. They determined which electrical signals the retina uses when communicating with the brain. Then, they mimicked the signals using electric-signal sending glasses in blind mice. The animals’ vision was restored to near normal.

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ReVision Formula Uses Classic Chinese Medicine for Liver to Improve Eyes

ReVision formula addresses chi for the eye using classic Chinese medicineWhat is ReVision formula, and how can its classic Chinese medicinal ingredients help improve eye health and conditions such as eye floaters? ReVision formula is a liquid taken orally several times per day with water. This tincture is based on Rambling Powder, also known as Xiao Yao San.

ReVision Formula is designed to support healthy vision. Some of the conditions it may address include macular degeneration, eye floaters, and glaucoma. The idea is that ReVision Formula helps improve blood circulation to the eye. From the point of view of Chinese medicine, it helps eliminate stagnation of the body’s energy (chi) to the eyes.

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Experimental Electronic Retinas Implanted in Two Patients

electronic retinal implantTwo men blinded by retinitis pigmentosa have had their sight partially restored by receiving electronic retinal implants at King’s College Hospital in England.

The surgery involves implanting a 3×3 mm2 microchip with 1,500 electrodes below the retina. A thin cable is run to a special sub-dermal control unit that is implanted behind the ear. When light reaches the eye, pixels in the chip are stimulated, sending electronic signals to the optic nerve and then to the brain. An external power unit can be connected to the chip using a magnetic disk implanted on the scalp. This allows the chip’s sensitivity to be altered.

Clinical trials began more than 6 years ago. The technology is improving over time, with the more recent patients reporting better visual acuity.

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Eggs Provide Nutrients and Ward Off Eye Disease

A new study further supports the benefits of eating eggs.

Michigan State University researchers sought to determine how eggs might be part of a healthy diet and also determine the impact egg consumption may have on cholesterol.  Egg eaters showed higher levels of such vital nutrients as vitamins B12, A, E, and C.  The study does remind us to enjoy eggs in moderation – four eggs per week is optimal.  Eating more than four eggs per week can lead to increased cholesterol.

Source: maculardegenerationassociation.org

Eating eggs can also help prevent a number of eye conditions including macular degeneration, cataracts, and glaucoma.

Vitamin C

In many parts of the world, especially in Europe and Asia, the value of vitamin C is well known.  It is considered to be an important part of routine glaucoma treatment. It lowers pressure in the eye by lessening fluid production within the eyeball and improving the circulation of aqueous humor, as toxins are removed, from the eye.  Vitamin C also improves the metabolism of collagen which is possibly an underlying cause of glaucoma.

Learn more about how the nutrients in eggs and other foods can increase your eye health and overall health.