Understanding Microbiology and Contact Lens Solutions

By William J. Gleason, OD

1. Which class of contact lenses must demonstrate independent safety and efficacy?
a. I
b. II
c. III
d. IV

2. When did the U.S. Congress enact Medical Device Amendments to regulate medical devices differently from drugs?
a. 1970
b. 1976
c. 1990
d. 1993

3. When did Congress pass the Safe Medical Device Act?
a. 1970
b. 1976
c. 1990
d. 1993

4. Significant risk contact lens clinical studies are primarily restricted to:
a. Extended wear
b. Daily wear
c. All solutions
d. Solutions with "known" components

5. As indicated by studies, what percentage of patients are noncompliant in one or more aspects of contact lens care?
a. More than 40 percent
b. 30 percent
c. 20 percent
d. 10 percent

6. In the 1970s, patients were taught to use how many solutions to care for contact lenses?
a. 1
b. 2
c. 3
d. 4

7. What type of disinfection was first used with soft contact lenses?
a. Hydrogen peroxide
b. Microwave
c. Thermal heat sink
d. Thermal steam

8. Early aerosol nonpreserved saline solutions had a pH as low as:
a. 2.7
b. 3.7
c. 4.7
d. 5.7

9. Which mark can companies around the world apply to their products if they meet the requirements for International Organization for Standardization (ISO) certification?
a. CE
b. EC
c. QC
d. QA

10. The soft lens saline solution made from salt tablets and distilled water was linked to a series of infections, the most serious being:
a. Acanthamoeba
b. Staphylococcus
c. Streptococcus
d. Pseudomonas

11. A preservative used in soft lens solutions in the 1970s that caused problems was:
a. Thimerosal
b. Sorbic acid
c. Dymed
d. Sodium borate

12. In 2005, reports began to surface about fungal infections in Singapore and Hong Kong related to which solution?
a. Opti-Free (Alcon)
b. Complete MoisturePlus (AMO)
c. AOSept (CIBA Vision)
d. Renu with MoistureLoc (Bausch & Lomb)

13. The Centers for Disease Control and Prevention (CDC) established a link between Complete MoisturePlus and which organism in the Chicago area?
a. Staphylococcus
b. Pseudomonas
c. Streptococcus
d. Acanthamoeba

14. What year were daily wear soft and GP contact lenses placed in Class II?
a. 1970
b. 1976
c. 1990
d. 1993

15. In the Stand-alone test procedure, the solution is separately and independently inoculated with three bacteria and two fungi at what level?
a. 1012
b. 109
c. 106
d. 103

16. In what year was the workshop Microbiological Testing for Contact Lens Care Productsheld?
a. 2000
b. 2003
c. 2006
d. 2009

17. The FDA has approved up to how many consecutive days and nights for patients to wear continuous wear contact lenses?
a. 30
b. 21
c. 14
d. 7

18. Proper cleaning and rinsing before lens storage reduces the microbial burden by about:
a. 1012
b. 109
c. 106
d. 103

19. Approximately what percentage of opened and used solution bottles and accessories are contaminated?
a. 55 percent
b. 45 percent
c. 35 percent
d. 25 percent

20. Which test is not used to evaluate cytotoxicity of contact lens polymers, accessories and solutions?
a. Monomer extractions
b. Agar diffusion
c. Primary ocular irritation
d. Systemic injection

Please enter the following personal information for our records:
Business Activity:
First Name:
Last Name:
Address 1:
Address 2:
Address 3:
City:
State:      Zip:
Email Address:
All fields are required before submitting the test.



Please Note: Pressing the above Submit button will complete the test process.
Please only press the button once.