Farsightedness
Introduction to Farsightedness
About 1 in 4 people in the U.S. have hyperopia or farsightedness, but
fortunately there are more ways to correct this eye disorder than ever before.
People with hyperopia or farsightedness have difficulty focusing on objects
close up, such as print in a book. More severe hyperopia would also cause
problems with seeing objects in the distance clearly, such as highway signs.
The occurrence of hyperopia increases with age; At least half of all persons
over the age of 65 have some degree of farsightedness.
What Causes It?
Hyperopia is a refractive error, like astigmatism and nearsightedness
(myopia). Having a refractive error means that light rays bend incorrectly into
your eye to transmit images to the brain. Farsightedness occurs when light
entering the eye focuses behind the retina, instead of directly on it. An
abnormally flat cornea or short eye can cause the light to enter the eye this
way.
Hyperopia often runs in families. It is often present at birth; however, many
children outgrow it.
What Are the Symptoms of Farsightedness?
Symptoms of farsightedness may include:
- Headaches
- Eye strain
- Difficulty concentrating or focusing on nearby
objects
- Fatigue or headache after performing a close task such as reading
If you
experience these symptoms of hyperopia while wearing your glasses or contact
lenses, you may need a new prescription.
How Is Farsightedness Diagnosed?
Farsightedness can be easily diagnosed by a basic eye exam given by your eye
doctor.
How Is Farsightedness Corrected?
To correct hyperopia you must change the way the light rays bend when
entering your eye. Glasses, contact lenses, or refractive surgery can all be
used to correct farsightedness.
Depending on the extent of your farsightedness, you may need to wear your
glasses or contact lenses at all times, or only when you need to see objects up
close, like when reading or sewing. With hyperopia, your prescription is a
positive number, such as +3.00. The higher the number, the stronger your lenses
will be.
If wearing contacts or glasses isn't for you, refractive surgery can reduce
or even eliminate your dependence on glasses or contact lenses. The most common
procedures to correct hyperopia include:
- PRK. During a photorefractive keratectomy a laser is used to flatten the cornea so that light rays can
focus closer to, or even on the retina.
- LASIK. During laser-assisted in situ keratomileusis, a flap is cut through
the top of the cornea, a laser removes some corneal tissue, and then the flap is
dropped back into place. LASIK is the most common surgery used to correct
farsightedness.
An even newer procedure for correcting mild hyperopia is the
implantation of plastic corneal rings called Intacs, which also alter the shape
of the cornea. One advantage of the rings is that they can be left in place
permanently, or they may be removed in case of a problem or adjusted should a
prescription change become necessary.
Talk to your eye doctor about which
treatment is best for you.
Reviewed by the doctors at The Cleveland Clinic Cole Eye Institute.
Edited by
Charlotte E. Grayson, MD,
WebMD, October 2004.
Portions of this page ©
The Cleveland Clinic 2000-2004
Last Editorial Review: 6/21/2005
- LASIK Eye Surgery - Get information about LASIK, refractive surgery for vision correction (of astigmatism, nearsightedness, farsightedness), risk factors (dry eyes, high myopia or hyperopia) and benefits.
- Eye Care - Get information on eye care tips and eye health, disorders and treatment with OTC eye-care products, and when to see an ophthalmologist about an eye infection or condition.
- LASEK Laser Eye Surgery - Learn about LASEK laser eye surgery including advantages and disadvantages.
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