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Doctor insights on: Eyes Or Pupils Different Size

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Pupil (Definition)

The pupil is the opening in the iris inside of the eye though which light is focused on the retinal film at the back of the eye. The iris can open and close in response to light to vary the amount inside the eye. It is what looks red, in the ...Read more


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What are reasons why my eye pupils are different sizes?

What are reasons why my eye pupils are different sizes?

Needs eval: Unequal pupils can be from many conditions, some of which are very serious. Seek attention from an ophthalmologist. ...Read more

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The pupil of the right eye of my girlfriend (18, contact lenses)is bigger than her left one.Can pupil sizes be different normally or is it a pathology?

The pupil of the right eye of my girlfriend (18, contact lenses)is bigger than her left one.Can pupil sizes be different normally or is it a pathology?

Yes, & maybe: Some people are born with different sized pupils & it doesn't mean anything. If she's only recently developed them, it could be a sign of neurological problems, though. I recommend looking at old pictures- if they were different when she was little, like they are now, there's nothing to worry about. ...Read more

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Pupils different sizes, noticed last yr. PCP noticed at physical. Since then notice it varies between equal and unequal sizes. Why? Ask eye doctor???

Pupils different sizes, noticed last yr. PCP noticed at physical. Since then notice it varies between equal and unequal sizes. Why?  Ask eye doctor???

Likely normal: About 20% of people have anisocoria, or unequal pupils. It is not indicative of any disease, and does not threaten vision. You have probably had it your whole life and never noticed. As long as you don't have any visual or other symptoms, there is probably nothing to do. Hope this helps! ...Read more

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I have hydrocephalus and my pupils are like a pindrop size and I have a brown spots on my eyes?

I have hydrocephalus and my pupils are like a pindrop size and I have a brown spots on my eyes?

See Eye MD: People with increased pressure around the brain must be followed by an ophthalmologist to detect nerve damage that can cause blindness. Make an appointment with an ophthalmologist. ...Read more

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Sisters pupil reacts to light but instantly returns to original (large) size even while light remains on eye? Is this normal?

Swinging flashlight : Testing for an afferent pupillary defect, a so-called marcus-gunn pupil, is performed with the swinging flashlight test. The comparison made is between the direct and consensual responses. When the consensual response exceeds the direct response, an optic nerve or retinal problem may be inferred. Your description may be of hippus, a benign tonal oscillation of the iris musculature. See an eye md. ...Read more

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Why does my eye have 2 different colors around the pupil, if you look up close?

Natural variation: Assuming that there is nothing wrong with the eye ( vision ok, no trauma, no redness, no pain) then what you are probably seeing is the natural variation of the iris color which can be patterned, variegated or as in your case sort of an outer ring of a different color than the inner ring. Enjoy the beauty of this as it is not harmful and will not affect eye health. ...Read more

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How do the pupils of your eye change size? What causes this?

How do the pupils of your eye change size? What causes this?

Light reflex: When your eye is exposed to light, the dilated pupils receive a signal from the retina, through your brain which tells them to close down to limit the light entry and protect the eye. The pupils (iris) is a muscular structure in a radial pattern which responds to light signals this way. ;pretty cool! ...Read more

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Can eye medicine(drops) effect the size of a pupil?

Can eye medicine(drops) effect the size of a pupil?

Yes: Eye doctors often use eye drops( atropine) to dilate the pupil so he/she can see the back the eye better during examination, but the pupil return to it normal size after the effect of the medication is gone. ...Read more