Soft Contact Lens Materials Flashcards
1
Q
What is all contact lens materials?
A
Polymers
2
Q
What are the two main grousp?
A
Hydrogels
Silicone Hydrogels
3
Q
When was the first pHEMA developed and was produced by who?
A
1961
Wichterle
4
Q
Who refined the pHEMA lens?
A
Bausch and Limb
5
Q
What are advantages of higher water content lenses?
A
Better comfort
Quick adaptation
Longer wearing time
Thicker so easier to handle
6
Q
What are disadvantages of water content lenses?
A
Fragile and shorter life span
Deposits
Less reliably produced
More solution problems
7
Q
What are examples of hydrogel materials?
A
Polymacon Nefilcon A Etafilcon Oculfilcon Omafilcon
8
Q
What material is hydrophobic?
A
Silicon
