RT Journal Article SR Electronic T1 Manual of Retinal Surgery JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 255 OP 256 DO 10.1136/bjo.75.4.255-c VO 75 IS 4 A1 A Chignell YR 1991 UL http://bjo.bmj.com/content/75/4/255.4.abstract AB