RT Journal Article SR Electronic T1 Essential Medical Ophthalmology. A problem oriented approach. JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 251 OP 251 DO 10.1136/bjo.86.2.251 VO 86 IS 2 A1 Dick, Andrew D YR 2002 UL http://bjo.bmj.com/content/86/2/251.abstract AB