<unk>  may be classified according to the affected lid structure delineated by the gray line (the muscle of Riolan) into anterior and posterior<unk> .<unk>  may be acute or chronic, depending on the acuity of onset and time course of clinical presentation. Alternatively,<unk>  can be classified based on meibomian gland morphology, tear osmolarity, and Schirmer test result into (1) seborrheic, (2) obstructive, (3) obstructive with sicca, and (4) sicca.
Blepharitis classification
Orbital cellulitis classification
Corneal ulcer laboratory findings
Erythrasma physical examination
Orbital cellulitis physical examination
Mastoiditis classification
Linitis plastica staging
Impetigo physical examination