Pupils: Normal = 3 to 5 mm (round and equal in size).
anisochoria (different sizes)
mydriatic (large pupils -dark-)
miotic (small pupils -light-)

PERRLA = pupils equally rounded, reactive to light and accomodation

See Pupillary Reflexes

Pupils

Argyll-Robertson Pupil
Miosis, non-reactive but responsive to accommodation (in neurosyphilis).

Adie's pupil
Minimal reaction and accommodation.