<prompt> Distance of distant direct ophthalmoscopy:25 cms50 cms75 cms100 cms  <response>: Distant Direct Ophthalmoscopy Distance at which DDO performed is 25cm done with direct ophthalmoscope. contains light source viewing window. Normally red glow seen Interpretations Red glow healthy retina Grey glow Retinal Detachment No glow vitreous haemorrhage Black spot in centre cataract or corneal opacity GOLD STANDARD FOR LOCATING SUBLUXATED LENS: DDO 