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NCLE Prep Exam 3 of 4 Q&A With Complete Solution
NCLE Prep Exam 3 of 4 
 
The tolerance for the overall lens diamter according to the ANSI standards is: 
 
A. +/-0.005mm 
B. +/-0.05mm 
C. +/-0.01mm 
D. +/-0.1mm - B. 
 
According to the ANSI standards (Z80.2-1989), the tolerance for the overall diameter of a contat lens is +/-0.05mm. ANSI standards have been developed to maintain quality in the contact lens industry. It is important to have an understanding of the ANSI guidelines. 
 
All of the following will enable the practitioner to verify ...