The commoner diseases of the eye : how to detect and how to treat them . Bloodvessels in Various Corneal Affections. (a) Superficial blood vessels in pannus. (b) Deep lying blood vessels in a recent case of in- terstitial keratitis. (c) Deep lying blood vessels in an old case of inter- stitial keratitis. guished with a dilated pupil, good illuminationand the corneal loup (when no other cornealsign of the disease remains) as branched linesrunning in the dee]) layers of the cornea. Theyare known, from the observer who first describesthem, as Hirschberg vessels. The opaque exudates may be absorbe
The commoner diseases of the eye : how to detect and how to treat them . Bloodvessels in Various Corneal Affections. (a) Superficial blood vessels in pannus. (b) Deep lying blood vessels in a recent case of in- terstitial keratitis. (c) Deep lying blood vessels in an old case of inter- stitial keratitis. guished with a dilated pupil, good illuminationand the corneal loup (when no other cornealsign of the disease remains) as branched linesrunning in the dee]) layers of the cornea. Theyare known, from the observer who first describesthem, as Hirschberg vessels. The opaque exudates may be absorbed com-pletely in a few weeks or months, or they may COMMONER DISEASES OF THE CORNEA 221 remain (especially over the pupillary area) fora much longer time, with more or less per-manent impairment of vision. Sometimes the. Cross Section Through a Cornea with Interstitial Keratitis, showing infiltration in stroma (s) and transverse and longitudinal section of newly formed bloodvessels (g g) in the middle and deep layers of the cornea. center of the cornea is first involved, the opacityextending towards the margin and the clearinggradually taking place from the center towards ~V~ COMMONER DISEASES OF THE EYE the margin. As a rule there are but slightphotophobia and lachrymation, even when thereis marked injection of the region surroundingthe margin of the cornea. When there is muchpain, tenderness, photophobia and pericornealinjection, iritis or choroiditis (or both) may besuspected—in fact vision may be permanentlydamaged or even practically destroyed from anextension of the inflammation to the internalstructures of the eyeball. Both eyes are usually attacked—rarely bothat one time. Indeed, the one first attacked is al-most always well before a like process beginsin the other. Relapses are not infreq
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