how do u treat cloudy eye in leopard geckos?

 
How do u treat cloudy eye in leopard geckos?
my leopard gecko has cloudy eye (i think) and i dont know what to do. he is a heathy 2 year old male. he eats sleeps and is active at night like he should be. its onley on his right eye and his other eye seem fine. can u help me? i dont know what to do.