A manual of diseases of the eye / by Charles H. May and Claud Worth.

  • May, Charles Henry, 1861-1943.
Date:
1906
Catalogue details

Licence: In copyright

Credit: A manual of diseases of the eye / by Charles H. May and Claud Worth. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    usually covers the upper part of the cornea (Fig. X., Plate 12^). The affected portion of the cornea presents a cloudy appear- ance, and is grayish and translucent ; its surface is uneven and vascularized, the bloodvessels springing from the con- junctival vessels at the limbus. The process advances until it covers the upper half of the cornea. Finally, the entjre cornea may be covered, in which case vision is reduced; to perception of light. Unless subsequent changes occur, complete retrogression is possible, so that the cornea can become transparent again. In marked cases iritis is apt to develop. Pannus is not merely due to mechanical irritation; but to a change similar to that which occurs in the conjunctiva. Ulcers of the cornea occur with or without pannus. They leave opacities, which interfeie with vision according to their seat and density. Sequelae.—Complete cure is usually effected in the mildest cases alone, or in more severe forms only when they are subjected to early treatment. Sequelae are very common, affect the conjunctiva, cornea, and lids, and produce per- manent disability of the eye. 1. Trichiasis and entropion occur as a result of cicatricial contraction of the conjunctiva with curving of the tarsus ; they are more pronounce 1 in the upper lid. As a result of this distortion of the lid with consequent changes in the position of the cilia, there is mechanical interference with the cornea, causing ulceration. 2. Ectropion (usually of the lower lid) follows in soitie cases, as a result of hypertrophy of the conjunctiva and contraction of the orbicularis. ' 3. Symblepharon results from cicatricial contraction of the conjunctiva ; when considerable, there is obliteration of the fornix. This condition restricts the movements of the eyeball. 4. Cornea] opacities result from pannus and corneal ulcers. After lasting some time, pannus changes into a thin, j^erma- nent layer of connective tissue. 5. Staphyloma of the cornea follows in some cases. ; 6. Xerosis, a contracted, dry, and scaly condition of the