Typical foam in the tear film, a feature of posterior chronic biepharitis, with a aetiology of dysfunction of meibomian glands, common in patients with acne rosacea.

• 典型的泡沫状泪膜，后部慢性睑缘炎的一个表现，原因是睑板腺功能障碍，常见于酒糟鼻的病人。