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The axons of the ganglion cells converge on the region of the retina called the
papilla or optic disk. They leave the globe as the optic nerve, in which they
maintain an orderly arrangement in the sense that fibres from the macular zone of
The optic tract fibres make synapses with nerve cells in the respective layers of
the lateral geniculate body, and the axons of these third-order nerve cells pass
upward to the calcarine fissure (a furrow) in each occipital lobe of the cerebral ...
Causes and effects of swelling of optic nerve head Chronic simple glaucoma
Sympathetic ophthalmitis Effects of ultraviolet and infrared rays. The history is
often quite typical. The pull of the vitreous on part of the retina creates a
sensation of ...
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This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review