Inflammatory Processes

Fig. 10.4. Pinguecula: amorphous, basophilic material in the stroma represents the elastotic degenerated collagen

The conjunctiva is prone to inflammations with many different causes, either infectious or as a part of a non-infectious dermatologic or systemic disease. Usually these lesions do not cause diagnostic problems, but a biopsy can be useful in making the correct diagnosis [97]. In this chapter the inflammatory processes of the conjunctiva are divided into acute, chronic and granu-lomatous. The only lesions mentioned separately are ligneous conjunctivitis and lesions caused by Chlamydia infections.

In acute conjunctivitis there is a rapid onset of a swollen, hyperaemic conjunctiva accompanied by increased tear formation. There may be a watery (viral infections), fibrinous (bacterial infections) or mucoid (allergic reac-

Fig. 10.5. Pinguecula: the elastotic collagen stains black in elastica staining (Elastica van Gieson stain)

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