Refraction test

Also termed vision test, the refraction test is an examination that tests an individual's ability to see an object at a specific distance.

The test is performed by an optometrist or ophthalmologist in the doctor's office.

The refraction test involves looking through a device to read letters or recognize symbols on a wall chart through lenses of differing strength which are moved into and out of the device.

This test is performed as part of a normal examination of the eye to determine whether an individual has normal vision.

It is also used to determine the prescription for eyeglasses or contact lenses.