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Not all pupils appear the same!

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Not all pupils appear the same!

Do you know that pupil can be of different sizes in each eye or different than normal size in both eyes?
When that happens, sometimes it’s just an abnormality. In other times, it can be a sign of infection, tumour growth or stroke. Sometimes the nerves in the brain are involved, in other times, the ciliary ganglion is involved. 

Adies Pupil
In 30-40 years old females, sometimes one pupil can be slower in reaction to light. It may look like it is larger in resting state as well. It could be affected by reduced tendon reflexes.

Argyll-Robertson Pupil
The pupils are small. Normally the pupil get smaller when they look at a near object. However, in Argyll Robertson pupil, it does not react to near object. They could be caused by diabetes or by infection.

Horner’s syndrome
In this cases, there is a triad of three abnormalities. Ptosis (droopy lid), Miosis (smaller pupil), anhydrosis (decrease in sweat gland function). It’s caused by a disruption of the sympathetic nerve leading to the affected eye. It can include the pre-ganglionic nerve, or post-ganglion nerve. It can be due to infections, multiple sclerosis, lung tumour,  internal carotid interruption, and cerebral-vascular accidents.

If you see your friend having unusual pupils, it’s always best to get the eyes check to rule out trauma, infection, growth or stroke.

Dr. Yan L. Liang, OD
Markham  Optometrist
www.wardenoptometry.ca

Contact Warden Optometry to book your appointment today.

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