Glass eyed cats

Glass eyes in the Catahoula breed are strictly aesthetics. Glass eyes are the result of the merle gene at work, the same gene that creates coat colors. Glass eyes in a Catahoula will not make them see better or worse, run faster, or do anything different than non-glass eye
Catahoulas. Now with that being said , Too many people breed for color and glass eyes. You take the risk of producing pups with sight or hearing problems when you breed merle to merle or merle to double merle. Old timers that know will tell you that you got to breed the blacks to get the blues. In other words a solid (non merle) to a merle ( spotted leopard) . Plenty folks breed (myself included) two merle dogs (spotted or patchwork) but run the risk of having some pups in the litter that are mostly white are white faced and these pups will usually have hearing or sight issues.