1 Maximum $140 - Macon and Warner Robins Campuses Only. 2  $140 - Macon Campus Only (Only for students taking at least 1 or more Macon on-campus hours.)  $40 - Warner Robins Campus Only (Only for students taking at least 1 or more Warner Robins on-campus hours.)
single-blind study. single-blind study. Etymology: L, singulus, one by one; AS, blind + L, studere, to be busy. an experiment in which the person collecting data knows whether the subject is in the control group or the experimental group, but subjects do not. See also double-blind study.
The refraction test is an eye exam that measures a person's prescription for eyeglasses or contact lenses. This test is performed by an ophthalmologist or optometrist. Both of these professionals are often called eye doctor.. You sit in a chair that has a special device (called a phoroptor or refractor) attached to it. You look through the device and focus on an eye chart 20 feet away. The device contains lenses of different strengths that can be moved into your view.