Preview Test: The Many Facets of Prism In Ophthalmic Lenses

1. What does a deviating prism do?

A. Break white light into component wavelengths

B. Redirect light rays

C. Change the location of an emergent light ray without changing its direction

D. Change the orientation of an image

2. Which device often uses rotation prisms?

A. Spectrophotometer

B. Bioptic telescope

C. Slit lamp

D. Ophthalmic lenses

3. In which direction does a triangular prism deviate light

A. Always toward the base

B. Always toward the left

C. Always up

D. Always toward the apex

4. In which direction does a triangular prism displace an image?

A. Always toward the base

B. Always toward the right

C. Always down

D. Always toward the apex

5. What is prism adaptation?

A. A phenomenon in which a prism changes shape to better address a patient's needs

B. A phenomenon in which the optical center is shifted laterally or vertically to induce prismatic effect

C. A phenomenon in which changes in neural circuitry allow people to change motor responses to visual input after wearing high prism lenses

D. A phenomenon in which prescribed prism non-adapts are fitted with new lenses

6. How does changing the apical angle influence the prismatic power of a triangular prism?

A. Increasing the apical angle measurement has no relation to the prismatic power

B. Increasing the apical angle measurement changes the base direction from base in to base out

C. Increasing the apical angle measurement decreases the prismatic power

D. Increasing the apical angle measurement increases the prismatic power

7. What type of prism would best serve as relieving prism for exotropia?

A. Base in prism

B. Base up prism

C. Base out prism

D. Base down prism

8. What type of prism would best serve as adverse prism for esophoria?

A. Base in prism

B. Base up prism

C. Base out prism

D. Base down prism

9. Which level of binocular sensory perception results in the perception of objects in three-dimensional space due to complex computations within the visual pathways?

A. Fusion

B. Stereopsis

C. Macular perception

D. Prism adaptation

10. Which of the following occurs when the eyes fixate on objects in the distance but converge too much for near vision?

A. Divergence insufficiency

B. Divergence excess

C. Convergence insufficiency

D. Convergence excess

11. What approximate percentage of the population has a horizontal deviation of 0 prism diopters to 2 prism diopters of exophoria at distance?

A. 28%

B. 58%

C. 68%

D. 88%

12. Prism in ophthalmic lenses can improve binocular vision for those with:

A. Tropias

B. Phorias

C. Astigmatism

D. Both a. and b. are correct

13. Both views from left and right eyes are merged in the ____ to form a single image.

A. Brain

B. Retina

C. Cornea

D. Optic nerve

14. Which of the following is not a condition treated with prism?

A. Hemianopsia

B. Tropias

C. Trigeminal dysphoria

D. Astigmatism

15. What is the name of the autoimmune condition that affects the junction between nerves and muscles (neuromuscular junctions) of the eye?

A. Cataract

B. Astigmatism

C. Myasthenia gravis

D. Macular degeneration

16. Binocular vision involves the eyes and the _______.

A. Brain

B. Meibomian glands

C. Tear film

D. Lashes

17. Mild Traumatic Brain Injury can affect cranial nerves, extraocular muscles, vergence, and:

A. Blink rate

B. Tear film

C. MGD

D. Eye alignment

18. Most people have less eye misalignment at distance than at near in binocular vision disorders. Which type of prism gradually increases the amount of prism from distance to near in an ophthalmic lens:

A. Rotational

B. Dispersion

C. Axial

D. Contour

19. The name of the prism used to relocate and expand patients' visual field when they live with homonymous hemianopsia.

A. Peripheral prisms

B. Dispersion prism

C. Contour prism

D. Rotation prism

20. A relieving prism displaces an image in this direction to relieve neural and muscular efforts during fixation:

A. Toward the apex

B. Toward the prism base

C. Has no effect on image displacement

D. Toward the viewers visual axis

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?

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