Why Does Your Pupil Change Size?

Why Does Your Pupil Change Size?

The pupil is the black part of the eye that is surrounded by the colored iris. The pupil is an opening that allows light to pass through the iris and into the back of the eye. Depending on the amount of light in the environment, the pupil can be of different sizes....
Causes and Treatments of Red Eyes

Causes and Treatments of Red Eyes

Eye redness occurs when the blood vessels on the surface of your eyes expand or dilate. This often happens when a foreign object or substance comes into contact with your eyes, or if they have contracted an infection. Fortunately, eye redness is temporary and takes...