Petriage Clinical Insights

IMPORTANT: This article, which is provided for educational purposes only, is based on published veterinary data and decades of work with pets and pet parents. The information provided here is not designed to be comprehensive but to help you avoid the pitfalls of online misinformation and most importantly, to frame the conversation you should have with your veterinarian. Your veterinarian’s perspective may differ from what is expressed here. Always consult with your veterinarian.

Eye Problems

Eye problems can manifest in many different ways. Don't assume it's allergies, or assume it's an eye condition your pet has previously experienced. Do not medicate the eyes unless instructed by your vet. Inappropriate medication can make the problem much worse. Address any eye concerns with your vet.


Observe the color and consistency of any eye discharge as well as the degree of redness in or around the eye. Use a flashlight to observe your pet's pupils and their response to the light. The pupils should shrink when first exposed to light. Note any absence of this shrinking or any differences in the pupil responses between both eyes.


  • White discoloration on the cornea, the eye surface, may indicate a corneal ulcer and should be addressed immediately. Contact your vet ASAP. 
  • Thick green or yellow discharge is most concerning. Contact your vet ASAP.  
  • A pet trying to scratch or rub the eye or a closed eye indicates pain. Use a protective cone immediately to avoid damage to the eye and contact your vet ASAP.  
  • Sudden blindness is very concerning. Seek vet care ASAP.


  • If you observe your pet trying to rub or scratch the eye, use a protective cone to prevent injury. 
  • Do not assume these current symptoms are similar to a previous eye diagnosis. Do not medicate the eye unless instructed by your vet. Incorrect medication can make the problem worse.