Mixed Challenge 1
Amount of oxygen that passes through a lens material of specified thickness
Dk/t
Therapeutic lenses provide what 3 functions?
Protection, healing promotion, pain reduction
A continuous wear lens is FDA-approved for what maximum schedule?
Up to 30 nights
Which soft lens preservative is no longer used due to corneal toxicity?
Thimerosal
Which of the following disinfecting agents is recommended for a soft contact lens patient with a history of allergic reactions?
A. Benzalkonium chloride
B. Hydrogen peroxide
C. Chlorhexidine
D. Thimerosal
B. Hydrogen peroxide
Which in-office tool smooths rough lens edges?
Polishing / blending tool
Which stabilization method uses the watermelon seed principle?
Prism ballast
What color marks the right GP lens?
Green
The most useful slit lamp illumination to view neovascularization:
A. Parallelpiped
B. Indirect illumination
C. Sclerotic scatter
D. Diffuse illumination
B. Indirect illumination
Pooling in the center fluorescein pattern means the lens is too _____.
Steep
A soft lens flares outward when liquid is added. This indicates:
The lens is inverted.
Why do we avoid rinsing lenses with tap water?
Acanthamoeba risk
Which solution step removes protein deposits over time?
Enzymatic cleaner
Which polishing compound degrades GP lenses and should never be used?
Silvo (ammonia-based)
Which instrument verifies truncation on a GP lens?
Diameter gauge
Which GP evaluation tool best shows edge defects?
Shadowgraph
A _______ edge design is often used for high minus power prescriptions so that the lens will better fit the eye.
Hyperflange
This structure produces tears.
Lacrimal gland
Which stabilization method is most comfortable but least stable?
Dynamic stabilization / double slab-off
Final Jeopardy!
Place Your Wagers! Teams may wager up to their current point total. Discuss your wager and then submit.
Wagers are locked! The Final Clinical Challenge will be revealed on the next slide.