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Updated: May 13, 2025
In the great class of the Articulata, we may start from an optic nerve simply coated with pigment, the latter sometimes forming a sort of pupil, but destitute of lens or other optical contrivance. With insects it is now known that the numerous facets on the cornea of their great compound eyes form true lenses, and that the cones include curiously modified nervous filaments.
This is especially apt to be the case in chronic glaucoma where the iris is adherent to the cornea, and in efforts to free the filtration angle by an iridectomy the iris is torn off in front of the adhesion and the filtration angle is not opened. As Elliot has pointed out, iridectomy is most open to attack on the ground of safety.
If "Fate" were indeed a reality, then he would fight it as he had fought Lars Larssen. He would unknot the tangled threads at whatever cost to himself. The doctor looked very grave when he had left Elaine's bedside the next morning. "The injuries are very serious," he told Rivière. "The cornea of the right eye has almost been destroyed by the acid.
At one time in my career I experimented very extensively with massage, not alone for the purpose of reducing intra-ocular tension, but in various diseases of the lid and cornea, and taught a trained nurse, who herself had a nebulous cornea, to make what I may call a specialty of this particular therapeutic procedure. She became exceedingly skillful and was quite faithful.
Thus new vessels shoot over the cornea of inflamed eyes, and into scirrhous tumours, when they become inflamed; and hence all inflamed parts grow together by intermixture, and inosculation of the new and old vessels. The heat is occasioned from the increased secretions either of mucus, or of the fibres, which produce or elongate the vessels.
The eyes, during this paroxysm, look bright, and, unless previously rendered dim by mucus, or opacity of the cornea, seem as if they were starting from their sockets. He becomes emaciated, and totters from feebleness in attempting to walk, or from a partial paralysis of the hind legs. During convalescence, he has sometimes, though rarely, profuse haemorrhage from the nose.
This is a rude contrivance compared with the iris, which by means of its muscular fibers can in a moment alter the size of the pupil, thus serving a similar purpose. The Refractive Media of the Eye. The eye is a closed chamber into which no light can pass but through the cornea.
The eye waters and is hypersensitive, the iris is discoloured and reacts sluggishly to light, and there is a zone of ciliary congestion around the cornea. The appearance of minute white nodules or flakes of lymph at the margin of the pupil is especially characteristic of syphilitic iritis.
The village escorted us to see the famous Black Lake below the peaks of Dormitor. The lake is beautiful enough, but too big for mystery, too small to be impressive. One had imagined it twinkling like the wicked pupil of a witch's eye, with cornea of white stones and eye-lashes of pine trees, and we desecrated even its stillness by shooting at wild duck with a rifle.
It is not uncommon for animals that have been given a rest to suffer from a second attack on being put to work. The attendant may observe a hazy or whitish condition of the margin of the cornea. The upper lid may show an abrupt bend of its margin and a deep wrinkle. The color of the iris appears to have lost its lustre, and the aqueous humor and lens may be cloudy.
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