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Eye Safety

May 5, 2009 by kalic · Leave a Comment 

Each day about 2000 U.S. workers have a job-related eye injury that requires medical treatment. About one third of the injuries are treated in hospital emergency departments and more than 100 of these injuries result in one or more days of lost work. The majority of these injuries result from small particles or objects striking or abrading the eye. Examples include metal slivers, wood chips, dust, and cement chips that are ejected by tools, wind blown, or fall from above a worker. Some of these objects, such as nails, staples, or slivers of wood or metal penetrate the eyeball and result in a permanent loss of vision. Large objects may also strike the eye/face, or a worker may run into an object causing blunt force trauma to the eyeball or eye socket. Chemical burns to one or both eyes from splashes of industrial chemicals or cleaning products are common. Thermal burns to the eye occur as well. Among welders, their assistants, and nearby workers, UV radiation burns (welder’s flash) routinely damage workers’ eyes and surrounding tissue.

In addition to common eye injuries, health care workers, laboratory staff, janitorial workers, animal handlers, and other workers may be at risk of acquiring infectious diseases via ocular exposure. Infectious diseases can be transmitted through the mucous membranes of the eye as a result of direct exposure (e.g., blood splashes, respiratory droplets generated during coughing or suctioning) or from touching the eyes with contaminated fingers or other objects. The infections may result in relatively minor conjunctivitis or reddening/soreness of the eye or in a life threatening disease such as HIV, B virus, or possibly even avian influenza.

Engineering controls should be used to reduce eye injuries and to protect against ocular infection exposures. Personal protective eyewear, such as goggles, face shields, safety glasses, or full face respirators must also be used when an eye hazard exists. The eye protection chosen for specific work situations depends upon the nature and extent of the hazard, the circumstances of exposure, other protective equipment used, and personal vision needs. Eye protection should be fit to an individual or adjustable to provide appropriate coverage. It should be comfortable and allow for sufficient peripheral vision. Selection of protective eyewear appropriate for a given task should be made based on a hazard assessment of each activity, including regulatory requirements when applicable.

cdc

Vision Impairment and Blindness

February 19, 2009 by kalic · Leave a Comment 

Also called: Low vision
Vision impairment, or low vision, means that even with eyeglasses, contact lenses, medicine or surgery, you don't see well. Vision impairment can range from mild to severe. The leading causes of vision impairment and blindness in the United States are age-related eye diseases: macular degeneration, cataract and glaucoma. Other eye disorders, eye injuries and birth defects can also cause vision loss.

A loss of vision means that you may have to reorganize your life and learn new ways of doing things. If you have some vision, visual aids such as special glasses and large print books can make life easier. There are also devices to help those with no vision, like text-reading software and braille books.

Sometimes, vision loss is preventable. Regular comprehensive eye exams and prompt treatment are critical.

National Eye Institute

Cancer of the Eye

December 23, 2008 by kalic · Leave a Comment 

 Cancer of the eye is uncommon. It can affect the outer parts of the eye, such as the eyelid, which are made up of muscles, skin and nerves. If the cancer starts inside the eyeball it's called intraocular cancer. The most common intraocular cancers in adults are melanoma and lymphoma. The most common eye cancer in children is retinoblastoma, which starts in the cells of the retina. Cancer can also spread to the eye from other parts of the body.Treatment for eye cancer varies by the type and by how advanced it is. It may include surgery, radiation therapy, freezing or heat therapy, or laser therapy.
Medline Plus

Glaucoma

December 23, 2008 by kalic · Leave a Comment 

 Glaucoma damages the eye's optic nerve. It is a leading cause of blindness in the United States. It usually happens when the fluid pressure inside the eyes slowly rises, damaging the optic nerve. Often there are no symptoms at first, but a comprehensive eye exam can detect it.People at risk should get eye exams at least every two years. They include


  • African Americans over age 40
  • People over age 60, especially Mexican Americans
  • People with a family history of glaucoma

Early treatment can help protect your eyes against vision loss. Treatments usually include prescription eyedrops and/or surgery.

National Eye Institute


Blindness

December 23, 2008 by kalic · 1 Comment 

Also called: Low vision
Vision impairment, or low vision, means that even with eyeglasses, contact lenses, medicine or surgery, you don't see well. Vision impairment can range from mild to severe. The leading causes of vision impairment and blindness in the United States are age-related eye diseases: macular degeneration, cataract and glaucoma. Other eye disorders, eye injuries and birth defects can also cause vision loss.
A loss of vision means that you may have to reorganize your life and learn new ways of doing things. If you have some vision, visual aids such as special glasses and large print books can make life easier. There are also devices to help those with no vision, like text-reading software and braille books.

Sometimes, vision loss is preventable. Regular comprehensive eye exams and prompt treatment are critical.

National Eye Institute.


Retinal Disorders

December 23, 2008 by kalic · Leave a Comment 

 The retina is a layer of tissue in the back of your eye that senses light and sends images to your brain. In the center of this nerve tissue is the macula. It provides the sharp, central vision needed for reading, driving and seeing fine detail.Retinal disorders affect this vital tissue. They can affect your vision, and some can be serious enough to cause blindness. Examples are


  • Retinal detachment – a medical emergency, when the retina is pulled away from the back of the eye
  • Macular pucker – scar tissue on the macula
  • Macular hole – a small break in the macula that usually happens to people over 60
  • Floaters – cobwebs or specks in your field of vision

National Eye Institute.


Refractive Errors

December 23, 2008 by kalic · Leave a Comment 

Also called: Farsightedness, Hyperopia, Myopia, Nearsightedness
Your cornea is the clear front part of your eye. It is like a window that controls and focuses the light coming into the eye. If your cornea has an irregular shape, the light does not focus properly. Everything looks blurry. This is a refractive error.
Four common refractive errors are


  • Myopia, or nearsightedness – clear vision close up but blurry in the distance
  • Hyperopia, or farsightedness – clear vision in the distance but blurry close up
  • Presbyopia – inability to focus close up as a result of aging
  • Astigmatism – focus problems caused by the cornea

Glasses or contact lenses can usually correct refractive errors. Laser eye surgery may also be a possibility.

National Eye Institute.


Laser Eye Surgery

December 23, 2008 by kalic · Leave a Comment 

Also called: Keratectomy, LASIK, LTK, PRK
For many people, laser eye surgery can correct their vision so they no longer need glasses or contact lenses. Laser eye surgery reshapes the cornea, the clear front part of the eye. This changes its focusing power.
There are different types of laser eye surgery. LASIK – laser-assisted in situ keratomileusis – is one of the most common. Many patients who have LASIK end up with 20/20 vision. But, like all medical procedures, it has both risks and benefits. Only your eye doctor can tell if you are a good candidate for laser eye surgery.

Medline Plus

Color Blindness

December 23, 2008 by kalic · Leave a Comment 

Most of us see our world in color. We enjoy looking at a lush green lawn or a red rose in full bloom. If you have a color vision defect, you may see these colors differently than most people.
There are three main kinds of color vision defects. Red-green color vision defects are the most common. This type occurs in men more than in women. The other major types are blue-yellow color vision defects and a complete absence of color vision.

Most of the time, color blindness is genetic. There is no treatment, but most people adjust and the condition doesn't limit their activities.

Medline Plus.


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