1. Complete discission of lens by V-shaped method;Ziegler;Jour. Amer. Med. Assoc.,1921
2. Secondary cataract opening by single straight incision, iridotomy by same method;Wheeler;Amer. Jour. Ophth.,1925
3. De l'iridotomie;De Wecker;Ann. d'Ocul.,1873
4. Guilford, P. The instruments used in ophthalmic surgery. In: A system of ophthalmic operations. Edited by C. A. Woods. 1911, v. 1, p. 497.
5. Inferior iridotomy in operations for cataract on eyes with posterior synechiae or pupillary membrane. Value of operation;Chandler;Arch. of Ophth.,1938