<unk>  is a V-shaped indentation observed in the lower eyelid when the patient's gaze is directed downwards. The medical<unk>  is characteristic of advanced cases of keratoconus and is caused by the cone-shaped cornea pressing down into the eyelid. It is named after American ophthalmologist Edwin Sterling<unk>  (born May 8, 1870 – died Feb. 2, 1958).
Munson's sign
Larrey's sign
Palla's sign
Amsler sign
Lazarus sign
Pemberton's sign
Halo sign
Froment's sign