RT Journal Article SR Electronic T1 Karyotype studies among children with severe visual handicap. JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 79 OP 89 DO 10.1136/bjo.54.2.79 VO 54 IS 2 A1 Fraser, G R A1 Friedmann, A I A1 Delhanty, J D A1 Edwards, J H A1 Glen-Bott, A M A1 Insley, J A1 Lele, K P A1 Mittwoch, U A1 Mutton, D YR 1970 UL http://bjo.bmj.com/content/54/2/79.abstract AB