Entropion (eyelid rolled inward),

Distichiasis (extra eyelashes or row of lashes growing from the lid margins): If present in acute clinical form, both conditions can cause irritation to and possibly damage the cornea. Signs of these defects are excessive tearing, ocular discharge and squinting. Clinical entropion and distichiasis can be very successfully corrected by surgery. While these hereditary conditions are present in Swissys, they are often so minor that they do not present any clinical evidence. This applies in particular to distichiasis. Many Swissys have extra eyelashes which are only apparent upon careful examination of the inside of the eyelids. Like with all ocular abnormalities, Swissys can be screened for these most frequently occuring defects and registered with the Canine Eye Registration Foundation (CERF).