Hello, I'm Dr. Deb. I'll do my best to help you today.
I'm sorry for this concern for Punky.
Several possible explanations for his eye discharge come to mind:
1. Since he's an outside cat, he could have irritated his eyes in some way as he enjoys his days outdoors. In most cases, we never know what might have been the underlying cause of the irritation in these cats.
2. He could be in the early phases of an Upper Respiratory Infection
(URI). If that's the case, then he may start sneezing
in another day or so.
3. Some cats with allergies will have a clear discharge.
Regardless of the underlying cause, as long as he's not squinting or keeping the eyes closed and the discharge is clearish (as opposed to yellow or green which usually implies a bacterial infection), then you may be able to successfully treat him at home.
You can gently flush out the eyes with sterile saline available at most pharmacies. The following list of over the counter human preparations are also acceptable to use.
The Systane products can be used in cats, but the ones with vasoconstrictors, such as naphazoline should be avoided. These products are labels as "taking the red out" or for "red eye".
Tears Naturale Nighttime
Systane Ultra lubricant sterile eye drops
Advanced Eye Relief Nighttime
Akwa Tears ointment
However, if he does start to sneeze and/or the eyes are closed and/or the eyes worsen, then a vet visit may be prudent.
I hope this helps and that you see improvement soon. Deb