*'''Tears''' - All reptiles produce tears. In snakes, tears produce a region of lubrication between the cornea and the spectacle, allowing the free movement of the eye. Paired nasolacrimal ducts drain the sub-spectacular spaces into the mouth near the vomeronasal organ. Tears cannot overflow the eyelids, as in mammals, so if a nasolacrimal duct is damaged there is a build-up of tears under the spectacle, which leads to a bullous spectaculopathy. | *'''Tears''' - All reptiles produce tears. In snakes, tears produce a region of lubrication between the cornea and the spectacle, allowing the free movement of the eye. Paired nasolacrimal ducts drain the sub-spectacular spaces into the mouth near the vomeronasal organ. Tears cannot overflow the eyelids, as in mammals, so if a nasolacrimal duct is damaged there is a build-up of tears under the spectacle, which leads to a bullous spectaculopathy. |