Visual Function

Seafood Omega-3s and High-Dose Vitamin A Slow Visual Loss in Retinitis Pigmentosa

The retina is a light-sensitive tissue lining the inner surface of the eye. Its specialized photoreceptor cells respond to incoming light by initiating a chain of reactions that trigger nerve impulses to the brain. The photoreceptors consist of two types of cells, rods and cones. The rods are responsible for night vision and when these cells are impaired, night vision dims. Individuals with the gene-based disease retinitis pigmentosa (Illustration) develop poor night vision that progresses to impaired peripheral vision (tunnel vision) and then loss of central vision. Some drug treatments…

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DHA Restriction in Early Development Leads to Distortions in Visual Pathways

If you pause to think about it, the ability of the eye to coordinate its visual responses to different types of inputs is quite remarkable. Besides responding to light with visual images, the eye responds to sound signals by turning the eye and head toward the direction of the sound. It responds to touch to determine the nature of the object it feels and processes three-dimensional vision as well. These coordinated functions occur as a result of neurons from the retina converging with other sensory neurons in two specialized brain…

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Corneal Nerves Regenerate and Function After Injury and DHA Plus PEDF Treatment

[frame src=”/wp-content/uploads/images/FOL4.12_Figure2.JPG” alt=”” width=”164″ height=”134″ align=”right”]Some nerve cells have the ability to grow and repair themselves after they have been injured. Encouraging nerves to regenerate and function after damage is a topic of vigorous research and progress. Nervous system and spinal cord injuries affect over 90,000 people in the U.S. every year and recovery from central nervous system (brain and spinal cord) injury is limited. Nerve regeneration happens more readily in the peripheral nerves than in the central nervous system, although emerging research suggests that some central nervous system repair…

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Preterm Infants Fed Fish Oil May Have Less Eye Disease

One of the conditions that preterm infants risk is abnormal retinal development (retinopathy). The chances are greater in infants weighing less than 1,250 grams (2 lb 12 oz) at birth. This disorder results from the abnormal development of blood vessels in the retina. Blood vessel growth requires long-chain polyunsaturated fatty acids (PUFAs), especially DHA, a long-chain omega-3 PUFA. Long-chain omega-3s have been shown to reduce the area of damage and improve healthy blood vessel growth in this condition. We know they are essential to healthy visual function and are especially…

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