What You Should Know About MR Hi-Index Materials
1. Plus lens thickness and weight is most affected by ____________ and ____________.
2. What percentage of lenses sold in the US annually are thinner and lighter than standard plastic?
3. What is one of the major advantages of freeform when considering lens material choice?
4. Which lens material is 80-90% biomass, Biobased Certified?
5. Lens thinness and lightness are the result of all of the following except
6. Improved scratch and abrasion resistance of an AR coating is the result of
7. The higher the lens index, the ______________.
8. Lens weight is a function of specific gravity (gms/cc3) and _____________.
9. All of the following are ways to increase use of high index lenses except
10. Drilled rimless requires lenses that have all of the following properties except… for durability.
11. What feature of high index lenses can help protect eyes from cataract formation?
12. All of the following are the characteristics of lenses that consumer value most except,
13. When MR-6 was replaced by MR-8, the Abbe value changed to
14. The difference between a drilled rimless hole in a high index lens vs. polycarbonate is
15. In what year was the impact standard requiring drop ball testing implemented?
16. Which of the following lenses provide blue-violet light attenuation?
17. Without AR, a 1.67 index lens is calculated to reflect what total percent of light?
18. When considering high index lenses, a higher index material ____________ produces a lens that is thinner and lighter than standard plastic (1.50).
19. To improve the impact resistance of an AR lens, in addition to the material's inherent impact strength, one would…?
20. Newton's rings are the result of a _______________ mismatch
Evaluation Questions
21. In questions 21-23 please rate the effectiveness of how well each course met the stated learning objectives: Met the stated learning objectives?
22. Avoided commercial bias/influence?
23. How would you rate the overall quality of the material presented?
24. How were you directed to this course?
25. Please describe the office in which you work.
