Distance of distant direct ophthalmoscopy:
25 cms
50 cms
75 cms
100 cms
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
Optics and Errors of Refraction