My only one with eye issues is a black horse with dark eyes, go figure lol! All summer she's anywhere from looking like she's sobbing to swollen half closed if I don't do anything about it. My blue eyed 2 and one eyed girl don't have near the problems, but they will get a little watery when outside in the sun all day. There was a big appy at my last barn with pink skin that needed to be kept out of the sun all the time, he was very sensitive. With my eye problem girlie, I wash her eyes out with a wet cloth - have even needed to flush it with a syringe in previous years - each morning before breakfast and put her fly mask on, then take it off every night. She usedto be incredibly head shy, and never let anyone touch her face to help her out, so when I first got her her eyes were swollen and looked pretty bad. They'd look almost that bad in the summer. Now this year she's decided that the fly mask is not the spawn of the devil, and she's improved so much she looks just fine! Now it really only acts up if I forget for a day.