General vision health

contact lenses lens online

contact lens product information

www.vision health institute .org

www.vision health.com

www.earthrenewal.org/vision.htm

www.lutein info.com

National Eye Institute

Open Directory's Vision Sites

Visual Ergonomics in the Workplace

Contact Lenses .org

www.uiowacontacts.com

www.nightanddaycontacts.com

www.bausch.com

Laser Surgery

LASIK

In a relatively short amount of time, LASIK has become the most commonly performed refractive surgery procedure. LASIK stands for "laser-assisted in situ keratomileusis," and it offers many patients very good uncorrected vision, with a short, comfortable recovery. Both nearsighted and farsighted people, and those with astigmatism, can benefit from LASIK.

From: www.visionhealthinstitute.org/lasik.html

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Macular degeneration is a condition that affects the macula, the central part of the retina. The macula is responsible for central vision and the ability to see detail.

From: www.lighthouse.org

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PRK (short for "photorefractive keratectomy") was the most common refractive surgery until LASIK became available. PRK is performed with an excimer laser, which reshapes the surface of the cornea so you can see better. Both nearsighted and farsighted people, and those with astigmatism, can benefit from PRK.

From: www.visionhealthinstitute.org/prk.html

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Cataracts

A cataract is a clouding of the lens of the eye. The lens is a clear oval structure with three layers: the nucleus, the cortex, and the capsule. It may help to think of the lens as a peach, where the nucleus is the peach pit, the cortex is the flesh of the peach surrounding the pit, and the capsule is the peach skin, or elastic covering of the lens. You have a cataract when the nucleus becomes opaque (that is, it is no longer clear) or when small opacities develop in the cortex that block or scatter light.

There are three types of cataracts which affect different parts of the lens and cause different symptoms and vision problems.

Nuclear cataract is the most common type of cataract, and is related to the aging process. The nucleus gradually hardens and becomes opaque, causing difficulty identifying colors and seeing at a distance.

Cortical cataract is the next most common type, often affecting people who have diabetes. Wedge-shaped opacities develop in the cortex, interfering with the passage of light. This can result in problems with glare and loss of contrast, as well as difficulty with distance and near vision.

Subcapsular cataract develops under the back of capsule or elastic covering of the lens and is common in people with diabetes or high myopia, adults with retinitis pigmentosa, and in people taking cortisone. This type of cataract can cause glare sensitivity and blur.

From: www.lighthouse.org

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Glaucoma

"Glaucoma" is the term for a diverse group of eye diseases, all of which involve progressive damage to the optic nerve. Glaucoma is usually, but not always, accompanied by high intraocular (internal) fluid pressure. Optic nerve damage produces certain characteristic defects in the individual’s peripheral (side) vision, or visual field.

From: www.lighthouse.org

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