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