Hydrogel and Silicone Hydrogel Lens Care

BY SUSAN J. GROMACKI, OD, MS, FAAO

1. In the regimen test, bacteria must have at least what reduction for each organism?
a. 4
b. 3
c. 2
d. 1

2. Which of these is not a wetting agent?
a. Hydroxypropyl methylcellulose
b. Isopropyl alcohol
c. Tetronic 1304
d. C9-ED3A

3. The wetting agent in Complete MPS Easy Rub Formula is:
a. TrisChem
b. Phosphate
c. Dexpant-5
d. Poloxamer 237

4. Which UV light is used in the PuriLens System?
a. A
b. B
c. C
d. D

5. For the clinical aspect of “substantial equivalency,” testing of a solution with new components or percentages may need only:
a. 120 subjects for 120 days
b. 30 subjects for 30 days
c. 60 subjects for 120 days
d. 60 subjects for 90 days

6. Which contact lens solution has been associated with Fusarium keratitis?
a. ReNu with MoistureLoc
b. ReNu MultiPlus
c. Complete MoisturePlus
d. Complete MPS Easy Rub Formula

7. Which of these acts as a cleaner/surfactant?
a. Citrate
b. Poloxamine
c. Polyhexanide hydrochloride
d. Edetate disodium

8. Ultrazyme and Unizyme contain which enzyme?
a. Subtilisin A
b. Pancreatin
c. Papain
d. Borate

9. The pH of hydrogen peroxide disinfection solutions is about:
a. 3
b. 4
c. 5
d. 6

10. About what percent of practitioners chose a silicone hydrogel material for new spherical contact lens patients?
a. 60
b. 70
c. 80
d. 90

11. In the stand-alone test, bacteria must be reduced by at least how many log units of 1.0 x 105 to 1.0 x 106?
a. 1
b. 2
c. 3
d. 4

12. Which of these is a buffer to regulate solution pH?
a. Thimerosal
b. Boric acid
c. Chlorhexidine
d. Edetate disodium

13. ReNu MultiPlus has as its preservative:
a. Polyquad
b. TrisChem
c. Polyhexanide
d. Dymed

14. The neutralization period with hydrogen peroxide systems is:
a. Three hours
b. Four hours
c. Five hours
d. Six hours

15. In the Andrasko study, about what percent of each patient’s corneas stained after using the PureVision/ReNu MultiPlus combination?
a. 60
b. 70
c. 80
d. 90

16. The fungi used in the FDA disinfection solution include:
a. Candida albicans
b. Staphylococcus aureus
c. Pseudomonas aeruginosa
d. Serratia marscens

17. Which of these is not a preservative?
a. Polyaminopropyl biguanide
b. Myristamidopropyl dimethylamine
c. Hydroxypropyl methylcellulose
d. Polyquaternium-1

18. The wetting agent in Opti-Free Replenish is:
a. Polyquad
b. Aldox
c. Tetronic 1304 and CR-ED3A
d. Citrate

19. The percent of hydrogen peroxide used in contact lens disinfection solution is about
a. 3
b. 4
c. 5
d. 6

20. Which contact lens care system is labeled to not be used with Illusions contact lenses?
a. Oxysept UltraCare Formula Disinfecting System
b. AOSept
c. ReNu MultiPlus
d. Opti-Free Replenish


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