A refraction test is usually given as part of a routine eye examination. It may also be called a vision test. This test tells your eye doctor exactly what prescription you need in your glasses or ...

An autorefractor helps detect the lens power required to accurately focus light on your retina. It takes a few seconds and requires you to put your chin on the chin rest and look towards the picture ...

When the first automated refractor was introduced in the United States in the 1970s, the instruments required a skilled operator and delivered questionable readings that were difficult to interpret.

Compr Ophthalmol Update. 2007;8(3):125-141. In the future, corneal biomechanics measurements, such as CH and CRF provided by the Ocular Response Analyzer, may play an important role in this ...