There are many different eye conditions that are associated with congenital nystagmus; theoretically, any bilateral visually-significant pathology present at birth or in infancy during the critical period of visual development may interfere with the development of stable fixation (1) Eventually I'll get around to discussing the finer points of nystagmus; but for now, I'm sticking to some basic study stuff.
Embryologic Development Of The Eye
Truth be told, there is not very much detail that needs to be learned about embryology; after all, we've already learned embryology in medical school. At the same time, there are some key embryology concepts that are very helpful to understanding ocular disease, and may also show up on test questions. There usually seems to be at least one question that addresses embryology, and there are tons of practice questions that test your knowledge of embryology.