Image 16 of 34
Summary
Comment
Loss of sympathetic nervous system input to (in this case) right eye.

Note that right pupil is smaller than right. Also that right eyelid covers a greater portion of eye than on left (known as ptosis). The etiology in this case was malignancy invading the sympathetic chain on the right.

Image Credit
Charlie Goldberg, M.D.

Horner's Syndrome 3