Abstract

References
1.
Dobree
J H
(1957 ) Trans. ophthal. Soc. U.K.
77 , 229
2.
Duke-Elder
S
(1940 ) Textbook of Ophthalmology , London; 3 , 2586
3.
Lister
A
Zwink
F B
(1953 ) Trans. ophthal. Soc. U.K.
73 , 55
4.
Morgan
O G
(1955 ) Trans. ophthal. Soc. U.K.
75 , 3
5.
Smith
R
(1955 ) Trans. ophthal. Soc. U.K.
75 , 265
6.
Stephenson
R W
(1956 ) Trans. ophthal. Soc. U.K.
76 , 253
7.
Vannas
S
Orma
H
(1957 ) Arch. Ophthal., Chicago
58 , 812
8.
Vannas
S
Tarkkanen
A
(1960 ) Brit. J. Ophthal.
44 , 583
