Horses do not
like stuff sprayed in their face, especially eyes and ears.
Anytime I had a eye issue it was never a spray but a ointment needing administered...
Still not easy when you realize how strong a horses eye lid is against our fingers.
I did the best I could by getting that tube in eye corner and depositing the ointment in...
Carefully wiping clean with disinfectant wipe the tube tip if a chance of a touch occurred..
Honestly, do not
put that ointment on your dirty fingertip full of germs...is it germs or a foreign object that created the problem and you are now intentionally introducing new and more germs for the eye to fight off.
yeah, just no.
Realistic and honest... You need a vet,
even though you are pretty sure of what you deal with.
If this was caused by a foreign object, you want to make darn sure that object is not lodged in the eye yet.
Don't be surprised when in a few days your horse is swollen eye shut, potentially in great pain with a eye infection now out of control.
If it is a scratch of the cornea...you have large problems and are risking forever the keen eyesight horses are gifted with. A corneal scratch is also very painful to the animal just as it is to a human.
There are few things I do not mess with ever...eyes and the sight so easily damaged or lost is not
one to mess around with in my thinking.
Please consider calling your vet for their assistance and making sure the OTC spray you are using is truly going to help what ails the horse.