RT Journal Article SR Electronic T1 SAFETY REQUIREMENTS FOR ACRYLIC IMPLANTS JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 359 OP 367 DO 10.1136/bjo.41.6.359 VO 41 IS 6 A1 Frederick Ridley YR 1957 UL http://bjo.bmj.com/content/41/6/359.abstract AB