👉 Perioptometry is a medical diagnostic tool used to measure the size, shape and shape of an eye. It involves using a device that measures the position of the cornea (the clear outer surface of the eye) in relation to the pupil. The measurement can be done by placing a small piece of film under the eye, which then records the changes in the position of the film as it moves through the pupil. The results are converted into an image on a screen and displayed to the patient
