A refractive error is the most common eye problem. When the shape of the eye is abnormal, the eye doesn't bend (or refract) light properly and vision is blurred.

If your vision blurs when you are looking at objects near or far, you should get an eye exam. The process of having a patient look through lenses of progressively stronger or weaker power is called refraction.

Refractive errors are just one potential cause of blurred vision, so it is important to have an examination right away if you are experiencing symptoms.

> Types of Refractive Errors

Correcting Your Vision

There are several alternatives for correcting your vision. You should discuss your vision and your lifestyle with your Eye M.D. to decide which of these will be best for you.

Eyeglasses and contact lenses are the most common methods of correcting refractive errors. They work by refocusing light rays on the retina, compensating for the shape of your eye.

Refractive surgery is also an option for correcting or improving your vision. This surgical procedure is used to adjust your eye's focusing ability by reshaping the cornea, or front surface of your eye. The most widely performed type of refractive surgery is called LASIK.

Last reviewed and updated in February 2009,
by the American Academy of Ophthalmology.