Retinoscopy is a technique used to objectively determine the refractive error of the eye by observing the reflection of light from the retina.
Lensometry measures the power of the lenses in a patient’s eyeglasses, helping to verify the current prescription.
Visual acuity of 20/40 means the patient must be 20 feet away to see what a person with normal vision can see at 40 feet.
A tonometer measures intraocular pressure, which is critical for diagnosing and monitoring glaucoma. The test assesses the fluid pressure inside the eye.
The cover test is used to detect misalignments of the eyes, such as strabismus, by observing how the eyes move when one is covered.
