81 OPHTHALMOSCOPIC EXAMINATION. If the refraction be E. or H. no lens is needed behind the mirror; if M., a concave lens must be placed in the clip behind the mirror, of sufficient strength to give a good, clear, erect image. The observer must come as near as possible to the patient. By reference… … Vertical section of healthy optic disk, etc. X about 15. B. Retina, outer layers shaded vertically, nerve-fibre layer shaded longitudinal!}'. Ch. Choroid. Scl. Scle- rotic. L. Or. Lamina cribrosa. S.V. Subvagiual space between outer and inner sheath of optic nerve. The central vein and one of the…
Eye · Color blindness
Internet Archive · Yale University, Cushing/Whitney Medical Library · Public domain (published before 1931). Free to use for anything.
