Sore/itchy
Inflammation of lid margin with ocular irritation, matted lashes
Blurry vision
Tearing
Crusting at the lid margins
Distinguish anterior from posterior<unk>  using slit lamp
Posterior - swelling and plugging of meibomian gland openings
Anterior - on external exam, material such as greasy flakes (seborrheic) or hard crust (staph) surrounds eyelashes
Posterior - swelling and plugging of meibomian gland openings
Anterior - on external exam, material such as greasy flakes (seborrheic) or hard crust (staph) surrounds eyelashes
Blepharitis
Normal IOP
Periorbital cellulitis
Orbital cellulitis
Facial cellulitis
Orbital pseudotumor
Orbital tumor
Sympathetic ophthalmia