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NCLE Study Guide with latest updated test.
NCLE Study Guide with latest updated test. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The FDA (Food and Drug Administration) - correct answer.? classifies lens material by how much water is in it and by the electronic charge. The water is either low or high, and percentages are given. The electronic charge is indicated with ionic or non-ionic. The materials are in four groups as follows: 
 
The FDA classifies lens material by four groups as follows: - correct answer.Group 1-low water < 50% water, non-ionic...
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