A 37-year-old man presented with an optic nerve pit and serous macular
detachment of the left eye. Scanning laser ophthalmoscopy revealed a
cyst-like structure terminating at the pit in the premacular vitreous.
During ocular movement, this structure moved vigorously and seemed to
exert traction on the pit. We believe that it is part of an anomalous
Cloquet's canal, and that traction on the pit may be a significant fa
ctor in the development of serous macular detachment in this patient.
(C) 1997 Japanese Ophthalmological Society.