Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 519
pears red, exceptat the place where the optic nerve enters, which is white. On the reddishground the retinal blood-vessels can be distinguished ; A, A, A, branchesof the retinal artery, have a brighter red colour, and more strongly reflecttlie light than the branches, B, B, B, of the retinal vein.… … During the last twenty years the ophthalmoscope has been the chiefTneans of extending the knowledge of oculists regarding the diseased andhealthy conditions of the eye. In this way the substance of the lens andthe state of the humours can be directly seen, the causes of impairedvision can be…
Inventions
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