Other medicines that get in the eyes, including medicine from asthma inhalers, can change pupil size. The use of eye drops is a common cause of a harmless change in pupil size. You could barely see any of the color in my eye, the pupil had gotten so big. I had contacts in so I immeditately took them out. I had no irratation, no headaches, no sign of anything. In some cases, the abnormal pupil may be the one that is smaller and in other cases the abnormal pupil may be the one that is larger. Unequal pupil sizes of more than 1 mm that develop later in life and do not return to equal size may be a sign of an eye, brain, blood vessel, or nerve disease. I was at work today and a coworker all of a sudden noticed how big one of my pupils got. What is anisocoria Anisocoria is a condition in which the pupils of the cats eyes are different sizes in other words, one pupil is larger than the other. If there are no other symptoms and if the pupils return to normal, then it is nothing to worry about. Boxer Wachler explains, Without being dilated with eye drops, if one pupil is dilated and not responsive to light, this could be from a brain tumor. If other family members also have similar pupils, then the pupil size difference could be genetic and is nothing to worry about.Īlso, for unknown reasons, pupils may temporarily differ in size. However, when someone notices that one pupil is bigger than the other, there may be no recent history of optometrist eye drops to dilate the pupil. Most often, the diameter difference is less than 0.5 mm, but it can be up to 1 mm.īabies born with different sized pupils may not have any underlying disorder. Slight differences in pupil sizes are found in up to 1 in 5 healthy people. ![]() It gets larger in dim light and smaller in bright light. The pupil is the black part in the center of the eye. There is yet a third very serious condition that can cause the appearance of one pupil larger than the other: ocular melanoma. Anisocoria Enlargement of one pupil Pupils of different size Eyes/pupils different sizeĪnisocoria is unequal pupil size.
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