RT Journal Article SR Electronic T1 Polyvinyl pyrrolidone (PVP) in cataract surgery. JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 477 OP 480 DO 10.1136/bjo.53.7.477 VO 53 IS 7 A1 R P Sarda A1 J M Makhija A1 R G Sharma YR 1969 UL http://bjo.bmj.com/content/53/7/477.abstract