CE Test Questions
Optics of Progressive Lenses - Part 2

Exam Questions
1. As the Add power of a progressive lens increases, the unwanted cylinder power typically:

    A. Decreases
    B. Increases
    C. Remains Unchanged
    D. Disappears
2. A “harder” Progressive Lens Design generally:

    A. Spreads Surface Astigmatism across a Larger Region
    B. Has Smaller Distance and Near Viewing Zones
    C. Works Well for Active Viewing Tasks
    D. Works Well for Critical viewing Tasks
3. An astigmatism contour plot of a “harder” progressive lens design generally has:

    A. More Closely Spaced Astigmatism Contours
    B. More Widely Spaced Astigmatism Contours
    C. Neither Closely spaced nor Widely Spaced Contours
    D. Both Closely Spaced and Widely Spaced Contours
4. A “softer” progressive lens design generally:

    A. Concentrates Surface Astigmatism into Smaller Regions
    B. Has Wider Distance and Near Viewing Zones
    C. Works Well for Active Viewing Tasks
    D. Works Well for Critical Viewing Tasks
5. An astigmatism contour plot of a “softer” progressive lens design generally has:

    A. More Closely Spaced Contours
    B. More Widely Spaced Astigmatism Contours
    C. Neither Closely spaced nor Widely Spaced Contours
    D. Both Closely Spaced and Widely Spaced Contours
6. The following is NOT an advantage of shorter progressive corridor lengths:

    A. More Near Vision Utility in Smaller Frames
    B. Reduced Eye Declination During Near Vision
    C. More Rapidly Increasing Unwanted Cylinder Power
    D. None of the Above
7. Progressive lens designs with ________ progressive corridors produce _________ unwanted cylinder power and/or narrow viewing zones:

    A. shorter, more
    B. shorter, less
    C. longer, more
    D. longer, less
8. A surface with a _____________ second derivative offers ____________ changes and power and magnification:

    A. continuous first derivative, discontinuity
    B. continuous second derivative, smooth
    C. continuous second derivative, broken
    D. None of the above
9. The variation in curvature from meridian to meridian at points in the periphery of a progressive lens surface is referred to as:

    A. Surface Astigmatism
    B. Ocular Astigmatism
    C. Prescribed Cylinder
    D. Spherical Aberration
10. “Higher order” wavefront aberrations include:

    A. Coma
    B. Spherical Aberration
    C. Trefoil
    D. All of the Above
11. _________________ states that the rate of change in cylinder power away from the progressive corridor is roughly equal to twice the rate of change in add power along the corridor:

    A. Minkwitz's theorem
    B. Garcy's 1st Law
    C. The Theory of Refraction
    D. Spline Theory
12. The following visual requirement is NOT a consideration for progressive lens design:

    A. Good Critical Vision
    B. Good Dynamic Vision
    C. Good Subnormal Vision
    D. Good Binocular Vision
13. The process of heating a glass mold over a former until it assumes the shape of the former is known as:

    A. Digital Surfacing
    B. Free-Form Surfacing
    C. As-Worn Optimization
    D. Slumping
14. When characterizing progressive lenses, ____________ is comparable to cylinder power and _____________ is comparable to sphere power.

    A. mean power, sphere power
    B. astigmatism, mean power
    C. astigmatism, conic power
    D. mean power, astigmatism
15. The rate of change in progressive surface astigmatism around the umbilic is ______________ to the Add power.

    A. proportional
    B. inversely proportional
    C. equal
    D. twice the distance
16. All of the following affect the performance and wearer acceptance of a lens design except

    A. magnitude of power and astigmatism
    B. distribution of power and astigmatism
    C. gradient of power and astigmatism
    D. add power
17. Continuous surface height results in a surface with no

    A. breaks
    B. discontinuities
    C. ledges
    D. all of the above
18. The first step in progressive lens design defines the

    A. size of distance and near zone
    B. geometry of the progressive corridor
    C. distribution of optics in the periphery
    D. all of the above
19. Modeling the theoretical optical performance of a lens using position of wear and calculating light refraction is called

    A. blur manipulation
    B. ray-tracing
    C. merit functions
    D. osculating spheres
20. The initial design for a progressive may need to be modified to produce the final mold because of

    A. lens materials shrinkage
    B. manufacturing process variations
    C. changes to desired surface powers
    D. all of the above

Evaluation Questions

21. In questions 21-24 please rate the effectiveness of how well each course met the stated learning objectives: Met the stated learning objectives?

    A. Excellent
    B. Very Good
    C. Good
    D. Fair
    E. Poor
22. Avoided commercial bias/influence?

    A. Excellent
    B. Very Good
    C. Good
    D. Fair
    E. Poor
23. How would you rate the overall quality of the material presented?

    A. Excellent
    B. Very Good
    C. Good
    D. Fair
    E. Poor
24. How were you directed to this course?

    A. 2020mag.com
    B. OAA Website
    C. NYSSO Website
    D. Ohio Opticians Website
    E. Other
25. Please describe the office in which you work.

    A. Independent Optician
    B. Independent Optometry
    C. Chain retail
    D. HMO/Military/Other
26. Comments on this program: