In which of the following conditions Berlin's edema is
Open angle glaucoma
After cataract surgery
After concussional trauma
Diabetic retinopathy
C i.e. After concussion trauma Blunt trauma to eye may produce Berlin's edema or commotio retinae Q which is a cloudy swelling characterized by a grey appaerance, most frequently in the temporal region. It may also manifest as cherry red spot in the foveal region.