Pupilometry is a diagnostic test that allows us to measure the size of the pupils at different light intensities.

In addition to observing how they change size depending on the intensity of the light, we also assess whether their reaction to the light impulse is correct.

The pupil is the small hole located in the center of the iris, through which light enters the inside of the eye. This opening can contract and dilate, regulating the amount of light that reaches the retina.

Currently, pupillometers with infrared light are the most accurate equipment for measuring pupil size. Pupillometry is an important test in refractive surgery and in the previous evaluation, which determines what type of intraocular lens is most suitable to implant in cataract surgery. In addition, the size of the pupils and their reaction to different stimuli are also relevant aspects in neurological examinations.

Olga Riera, Department of Ocular Biometry at the Barraquer Ophthalmology Centre