Visual adaptation

Visual adaptation is called the pupil's ability to adjust to the brightness of each environment by compressing or dilating.

In bright environments, the pupil can reach a diameter of up to 1.5mm, causing less light to enter the eyeball, protecting the retina from possible glare.

In darker environments, the pupil dilates, reaching a diameter of up to 10mm. Thus, the incidence of light increases in the eyeball, enabling vision in such environments.