Is it bothering him?
How long is it there?
Is it red?
Is he trying to rub it?
Does it look like this:
You may be seeing the third eyelid which appears in times of pain, stress or illness.
I am so sorry your boy is dealing with this. He may have scratched his cornea or gotten something in his eye. It can also be an abasion or a clogged tear duct.
You an apply a damp teabag for 30 seconds every hour.
If it continues to look angry or he closes his eye, he should be seen. Do not allow him to rub it.
Please let me know how he is doing. I hope he feels better very soon.
Sincerest best wishes,
Oh you saved him from a shelter!! May God bless you. He likely has herpes:
Add 125 mg of l-lycine to his water every day to prevent outbreaks.
I hope he will be just fine.