Accepted Answer

Hi there,

Thank you for your post!

Seeing as this is in a young cat, with vision that appears to be intact - this is hard to be very concerning.

In an older cat, problems such as lens luxations, hypertension, inflammation, and even cancer can lead to this.

In a younger cat with this from birth - it is possible to have an iris abnormality (making the pupil appear larger) or even a problem with the sensory and afferent nerves controlling the iris (to make the pupil look larger).

Although it does not appear to be an emergency, based on the chronicity of the problem - I would make an appointment to see the veterinarian to evaluate the eye to see if there is an abnormality causing this...but my suspicion is that this is unlikely to be a problem based on your history.
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Please click "ACCEPT" if the information I have provided has been of help so I receive credit for my work. Bonuses are always welcome and appreciated. Thank you.
The above is given for information only. Although I am a licensed veterinarian, I cannot legally prescribe medicines or diagnose your pet's condition without performing a physical exam. If you have concerns about your pet I would highly advise contacting your regular veterinarian.

Expert:	CriticalCareVet
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Accepts:
Answered:	10/18/2009

Critical Care Veterinarian

Emergency and Critical Care Specialist