- Follicular conjunctivitis is caused by viruses, bacteria, and toxins present in certain eye drops. In contrast to papillae, follicles are small, dome-shaped nodules without a prominent central vessel. Accordingly, whereas a papilla clinically appears more red on its surface and more pale at its base, a follicle appears more pale on its surface and more red at its base. The follicles in follicular conjunctivitis are typically most prominent in the inferior palpebral and forniceal conjunctiva.
Follicles vs Papillae
