My blue eyed gelding (named Blue, very original
) has natural eyeliner on one side but the other eye is completely surrounded in white. That eye is quite weepy and crusty so can be hard to keep clean. He also requires sunscreen for bald patches on his face due to bad sunburn in the past before I owned him. He is prone to allergies according to his last owner and quite often has a runny nose. I am hesitant to put any creams too close to his eye so I just try and wipe it every second day, I figure that over washing it could its own problems. I think next summer I will try a face mask on him so I don't have to use so much sunscreen, I don't like the way it builds up and its quite hard to clean off without scrubbing at his face.
I did buy a tube of black 'show paint' which someone on here suggested using for horses as bright sunlight really seems to bother that eye but I havent tried it yet.
Every few days I put a moisturiser on the skin where it is flaky which seems to help.