Some potential complications from cataract surgery include: corneal abrasion from Schiotz tonometry; retrobulbar hemorrhage from retrobulbar block requiring pressure bandaging; oculocardiac reflex from retrobulbar block treated with atropine; perforated globe risk minimized with gentle injection; subconjunctival hemorrhage requiring no treatment. Posterior dislocation of the lens during retrobulbar block requires postponing surgery and managing as a posterior dislocation.