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Updated: May 2, 2025
In some cases the iris becomes adherent to the head of the ciliary processes and, when atrophy of the ciliary body occurs, is drawn backward at the base of the iris by the receding tissues. If the hypertension persists or is repeated at varying periods, a slow atrophy of the uveal tract sets in.
Punctured wounds of the orbit are especially dangerous. Wounds apparently confined to the external parts often conceal deep-seated mischief. 4. =Of the Eye.= The iris may be injured by sharp blows, as from the cork of a soda-water bottle. It is usually followed by hæmorrhage into the anterior chamber, and there may be separation of the iris from its ciliary border.
During the acute attack, the vitreous may become slightly turbid by transudation of serum from the vessel of the ciliary body and the chorioid and may become filled with fibrin. In some chronic cases in which absolute glaucoma is reached the development of small blood vessels in convoluted loops springing from the vessels of the discs has been observed.
To flatten the lens, the ciliary muscle relaxes, the elastic force of the eyeball resumes its tension on the suspensory ligament, and the membranous capsule resumes its pressure on the sides of the lens. This pressure, overcoming the elastic force of the lens, flattens it.
The smaller segment, which forms about one sixth of the whole, is set upon the larger and forms the projecting transparent portion in front. Yellow spot. 2. Blind spot. 3. Retina. 4. Choroid coat. 5. Sclerotic coat. 6. Crystalline lens. 7. Suspensory ligament. 8. Ciliary processes and ciliary muscle. 9. Iris containing the pupil. 10. Cornea. 11. Lymph duct. 12. Conjunctiva. 13.
From some occasional acrimony of the tears, the lining of this duct may be inflamed and thickened, or some foreign body, or some unctuous matter from the ciliary glands, may insinuate itself into the duct, and the fluid accumulates in the sac and distends it, and it bursts; or the ulcer eats through the integument, and there is a small fistulous opening beneath the inner canthus of the eye, or there is a constant discharge from it.
This is about one fourth of an inch thick and one third of an inch through its long diameter, and is more curved on the back than on the front surface. Both the lens and the capsule are highly elastic. *Chambers and "Humors" of the Eyeball.*—The crystalline lens together with the suspensory ligament and the ciliary processes form a partition across the eyeball.
At the conclusion he delivered himself in this wise: "I find, Miss Church-Member, that your eyes are very much out of order. A complex case, indeed. I have discovered ametropia in the particular form of irregular astigmatism. The pupil, covered by the unabsorbed remains of the pupillary membrane, is occluded by a deposition of inflammatory substance, occasioned by inflammation of the ciliary body.
Presently one of the trees as I must call them unfolded a long ciliary process, with which it seized one of the gleaming fruits that glittered on its summit, and, sweeping slowly down, held it within reach of Animula. The sylph took it in her delicate hand and began to eat.
Kepler likewise observed the power of accommodating the eye to different distances, and he ascribed it to the contraction of the ciliary processes, which drew the sides of the eyeball towards the crystalline lens, and thus elongated the eye so as to produce an adjustment of it for near objects.
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