A change in pupil size or shape, or pupils of different sizes.

Beta-blockers do not affect pupil size or focusing that is needed to read printed material at close range.

His device measures pupil size, tracks eye movement and gauges the eyes' reaction to light.

After 25 years of age the average pupil size decreases, though not at a steady rate.

Most displays are not performed in total darkness; thus a pupil size of 4-5 mm is more likely.

With an injury to the eye, the muscles that control the pupil size and shape can be damaged.

Other medicines that get in the eyes, including medicine from asthma inhalers, can change pupil size.

Treatment depends on the cause of the unequal pupil size.

You should see a doctor if you have sudden changes in pupil size.

If you have differing pupil size after an eye or head injury, get medical help immediately.