Soft Contact Lenses Flashcards
What is the water content and centre thickness of a LWC lens?
38-50%
0.04-0.10 mm
What is the water content and centre thickness of a MWC lens?
50-60%
0.07-0.12 mm
What is the water content and centre thickness of a HWC lens?
60-75%
0.08-0.15 mm
What is the water content and centre thickness of a SiHy lens?
24-47%
0.08-0.09 mm
What is the typical Dk/t of LWC hydrogel lenses?
17
What is the typical Dk/t of MWC hydrogel lenses?
25
What is the typical Dk/t of HWC hydrogel lenses?
25
What is the typical Dk/t of LWC SiHy lenses?
175
What is the typical Dk/t of HWC SiHy lenses?
86
What is the typical Dk/t of SA RGP lenses?
27
Range = 12-60
What is the typical Dk/t of FSA RGP lenses?
60
Range = 40-100+
What is the typical Dk/t of F RGP lenses?
130
What is the min required Dk/t for Daily Wear?
24
What is the min required Dk/t for Extended Wear?
87
FDA - Group I
LWC, non-ionic
FDA - Group II
HWC, non-ionic
FDA - Group III
LWC, ionic
FDA - Group IV
HWC, ionic
Group I examples
polyHEMA
Group II examples
omafilcon A (Proclear)
Focus Dailies
SofLens Daily Disposable
Group III examples
Durasoft
Group IV examples
Focus 1-2 wk etafilcon A (Acuvue 2, 1-day Acuvue)
etafilcon A
Acuvue Acuvue 2 Surevue 1-Day Acuvue 1-Day Acuvue Moist
Silicone Hydrogel materials
balafilcon A
lotrafilcon A & B
galyfilcon A
senofilcon A
