NCLE Study Guide Part 3 out 4 Questions and Answers

NCLE Study Guide Part 3 out 4 Questions and Answers The FDA (Food and Drug Administration) - ️️ ? 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: - ️️ Group 1-low water 50% water, non-ionic polymers (this group includes silicone hydrogel polymers) Group 2- high water 50% water, non-ionic polymers Group 3- low water 50% water, ionic polymers Group 4- high water 50% water, ionic polymers The FDA tests disinfectants for their successfulness against these four microorganism groups: - ️️ •gram-positive cocci •gram-negative rods •yeast •fungi "disposable lenses" - ️️ The FDA classification for ? means the lens is disposed of after removal. extended wear (EW) - ️️ The FDA classification for ? is 1 week,