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Updated: June 29, 2025
The margin of the iris is firmly connected with the eyeball all round, at the junction of the sclerotic and the cornea. The Retina. The third and innermost coat of the eyeball is the retina. This is the perceptive coat, without which it would be impossible to see, and upon which the images of external objects are received.
Mercurial ointment, rubbed over the eyebrow, will assist in stimulating the absorbents. When the disease has progressed for a long time, and the pain, as is often the case, seems intense, it will save the animal great suffering, by opening the ball and allowing the humours to escape. This may be done by puncturing the cornea or the sclerotic coat with a needle.
The outer membrane is converted into the white protective or sclerotic coat in front, the transparent cornea. The eye is now formed in all its essential parts. The further development the complicated differentiation and composition of the various parts is a matter of detail.
The eye is bathed with a watery fluid, and protected by the eyelids and the eyebrows; it is moved in various directions, by muscles, all of which will soon be described. The Coats of the Eyeball. The eyeball proper is elastic but firm, and is composed of three coats, or layers, each of which performs important functions. These coats are the sclerotic, the choroid, and the retina.
And though he knew the poor devil, he pretended to see him for the first time, murmured something about "cornea," "opaque cornea," "sclerotic," "facies," then asked him in a paternal tone "My friend, have you long had this terrible infirmity? Instead of getting drunk at the public, you'd do better to die yourself." He advised him to take good wine, good beer, and good joints.
The posterior part of the trunk, the axillae, the sclerotic coats of the eyes, the nails, and the skin of the head remained in their natural state and preserved their natural color. The linen of the patient was stained blue. Chemical analysis seemed to throw no light on this case, and the patient improved on alkaline treatment.
The choroid coat lies immediately beneath the sclerotic coat at all places except a small margin toward the front of the eyeball. It is composed chiefly of blood vessels and a delicate form of connective tissue that holds them in place. It contains numerous pigment cells which give it a dark appearance and serve to absorb surplus light.
The symptoms were all there, but might not that have been due to my depressed condition for it does depress a writer to have one of his best veins become sclerotic I asked myself, and finally, as I went off to sleep, I concluded that I had been in the wrong all through, and had imagined there was something there when there really was not.
It is surrounded by coats, which contain refracting mediums, called humors. There are three coats, called the sclerotic, the choroid, and the retina; and three humors, called the aqueous, the crystalline, and the vitreous. The sclerotic or outer coat, called also the white of the eye, is an opaque, fibrous membrane.
The sclerotic coat is the outside layer and enclosing membrane of the eyeball. It is a tough, fibrous coat for the protection and maintenance of the shape of the eye. It is white and glistening in appearance, and is in part visible, to which the phrase, "the white of the eye," is applied.
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