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2. The optical quality of currently manufactured intraocular lenses;Olson;Am J Ophthalmol,1979
3. American National Standard for Ophthalmics—Intraocular Lenses—Optical and Physical Requirements, ANSI Z80.7-1984,1984
4. Approval Standard of Intraocular Lenses in Japan, PAB Notification 489. Director-General of the Pharmaceutical Affairs Bureau, Ministry of Health and Welfare, Tokyo, May 10, 1985
5. Council Directive 93/42/EEC of 14 June 1993;Official J Eur Commun,1991