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Dr. Ebtisam Al Alawi  | Kids Eye Care  | Eye Care Myths & facts  |  Why Visit Eye Center  | For Professional Use
Eye Care | Eye Care
Living With One Good Eye
People who lose vision in one eye because of an injury or a medical condition must adapt to a narrower field of vision and loss of depth perception. They still see small objects as well as before, assuming the other eye is normal.

People often think children with strabismus (misalignment of the eye) or amblyopia (lazy eye) have poor depth perception because they have trouble using two eyes together. Although these children do poorly on tests of depth perception in an ophthalmologist's office, they have learned to adapt from an early age. In real-world circumstances, they do not have trouble with depth perception.

At first, adults who lose vision in one eye tend to have a few fender-benders, and reach out next to the hand they want to shake. But with patience and time, they learn to use clues to depth perception that do not require both eyes.

Eye Glasses
Sixty percent of the 161 million Americans who wear prescription eyewear choose eyeglasses. Wearing eyeglasses is one of the simplest ways to correct vision problems.

To see images clearly, light rays must focus directly on the retina, the light-sensitive nerve layer that lines the back of the eye. There are different kinds of focusing problems, called refractive errors, which may require corrective lenses. In the case of myopia or nearsightedness, the eye is too long. Light rays focus before reaching the retina and images appear blurry. In hyperopia or farsightedness, the eye is too short, so light rays have not yet focused when they reach the retina. Astigmatism describes an eye with a cornea that is oval shaped instead of round, causing light rays to hit the retina in more than one place.

Eyeglass lenses compensate for an eye that is too long or too short by adding or subtracting focusing power. The lenses create just the right amount of focusing power so light rays focus directly on the retina.
A plus (+) in front of the first number of the eyeglass prescription means the lens corrects farsightedness. A minus (-) in front of the first number means the lens corrects nearsightedness. If a second and third number are present in the prescription, they indicate astigmatism. The higher the first number in the prescription, the greater the correction in the lens.

Lenses are available in glass, regular and high index plastic, and polycarbonate. Although they scratch less easily, glass lenses tend to be heavier and often slide down the nose. Plastic and polycarbonate lenses are lighter and safer than glass but scratch easily. Scratches cannot be removed but they can be avoided or minimized with appropriate care. Scratch resistant coatings can be applied to plastic and polycarbonate lenses but some of these coatings crack if exposed to extreme heat or cold.

Frames come in many shapes and sizes, so it is important to pick a frame that is best for you. Factors to take into consideration when selecting a frame include facial features, age, activities and the prescription itself. Often a strong prescription requires thicker lenses, which can affect your choice of frames.
Ask about the quality and expected lifetime of the frame and if there is a frame guarantee.
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