How long does it take to surgically remove a chalazion on a 16 month old? how long will she be out?

Very brief: Surgery is brief (less than 5 minutes). The anesthesia component will take longer (putting to sleep and waking up).

Chalazion in a child: One may consider injecting kenalog (triamcinolone) (steroid suspension) into the lesion before consider surgical excision. Injection can be performed under sedation without having put the infant to general anesthesia.

10-15 minutes: These can be done in 10-15 minutes (at least when I do them).