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18 Cards in this Set
- Front
- Back
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HEMA
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monomer from which 1st CL made
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EGDMA
Ethlene glycol dimethacrylate |
increased stability
low Dk |
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MAA
methacrylic acid |
increases water content
increased O2 permeability susceptible to deposits |
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MMA
methyl methacrylate |
improved hardness and strength
low water content low O2 permeability |
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vinyl pyrrolidone
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high water content
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styrene
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high index
low water content water insoluble |
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silicone
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high O2 permeablity
poor wettability |
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silicone hydrogel
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high O2 permeability
wettable |
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daily cleaner
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removes loosely bound foreign material w/ a surfactant
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rinse
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removes cleaner, lossened deposits, microorg, rinse after overnight storage
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saline
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rinse
preserved w/ thimerosol or unpreserved in past made w/ water and salt; unpreserved today |
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multipurpose sol w/ perservatives
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rinse
thimerosol sorbic acid/K sorbate benzyl alcohol PAPB/dymed polyquad aldox poyhexanide |
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disinfectant
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kills or deactivates pathogens
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chemical disinfectant
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toxic preservatives
use on lens types surfactant important most used today neglible effect on AIDS/HIV & acanthambeoa |
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oxidative disinfectant (H2O2)
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efficacious
eliminates perservative sensitivities CDC approved for AIDS/HIV |
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thermal disinfecatant
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disinfection doesnt kill spores but sterilization does
effective against all pathogens damages lenses w/ long term use CI in high water lenses bakes protein on lenses |
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periodic cleaner (enzymatic)
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removes/loosens tightly bound protein
use once a week types: papain, pancreatin, subtilism |
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rewetting drops
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symptomatic patients
EW patients rehydrates lens alleviates discomfort flushes debris from lens and eye |
