Manufacturing, Inspection, & Modification (Soft Lenses) Flashcards
Hydrogel materials allow the transport of oxygen to the cornea and carbon dioxide away from the cornea because they contain
A. Acrylic polymer chains
B. Water bound to reactive sites
C. Three dimensional polymers
D. None of the above
Water bound to reactive sites
The FDA has created five lens groups to clarify categories of similar hydrophilic lens polymers. These groups are defined by
A. Method of manufacture
B. Diameter and thickness of the lens
C. Water content, electrostatic, and material properties
D. None of the above
Water content, electrostatic, and material properties
The chemical make-up of hydrogel lens material is listed in the
A. Package insert
B. Fitting guide
C. Consumer advertisements
D. Patient instructions
Package insert
During the lathe cutting process, humidity must be controlled at a low level in order to
A. Avoid premature hydration
B. Maintain quality standards
C. Avoid destruction of the lens
D. Avoid toxic fume contamination
Avoid premature hydration
A spin-cast lens will generate
A. A toric back surface
B. A spherical back surface
C. An aspheric back surface
D. A convex back surface
An aspheric back surface
The lens stabilization system most often used to prevent or control rotation of toric soft lenses is
A. Lenticularization
B. Truncation
C. Prism ballast
D. Thin zones (double slab-off)
Prism ballast
The term GMP stands for
A. Government Mandated Process
B. Good Manufacturing Practices
C. Graded Member Projections
D. Granted Marketing Procedures
Good Manufacturing Practices
Which two of the following hydrogel parameters can be readily verified in the office?
A. Base curve
B. Power
C. Diameter
D. Peripheral curve
Power and Diameter
Which of the following hydrogel lens parameters may be modified in office?
A. Base curve
B. Power
C. Diameter
D. None of the Above
None of the Above
