TQ Quiz | Scleral Lenses 101 and 102: The Basics and Beyond (Scottsdale 2025)

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1. Which of the following is the best material, in terms of health, for a scleral lens?*

A. Dk < 50

B. Dk 50-75

C. Dk 75-124

D. Dk >125

2. Which of the following optical measurements if most helpful when determining initial scleral lens diameter?*

A. Steep Keratometry value

B. HVID

C. Corneal thickness

D. Pupil Size

3. Which of the following classification is indicative of a mini-scleral lens?*

A. 12.9mm to 13.5mm

B. 13.6mm to 14.9mm

C. 15.0mm to 18.0mm

D. 18.1mm to 24+mm

4. Which term best describes the shape of the sclera?*

A. Nonrotationally symmetric

B. Symmetric

C. Spherical

D. Tangential

5. When fitting a scleral lens, if the lens is steepened in the base curve by 1 Diopter, what change needs to be made to the lens power to compensate for the base curve change?*

A. -1.00D

B. +1.00D

C. -0.50D

D. +0.50D

6. Of the following, what is the ideal clearance for a scleral lens that has settled for 1 hour?*

A. Greater than 600 microns

B. 400 - 500 microns

C. 300- 400 microns

D. 100 - 300 microns

7. What is the proper had position for scleral lens application?*

A. Head back, lens applied downward

B. Head straight forward, lens applied

C. Head down, lens applied upward

D. Head down, and then moved to primary position while applying the lens

8. During scleral lens removal, where should the small DMV be placed on the lens?*

A. Center of the lens

B. Central 2/3 of the lens

C. Peripheral 1/3 of the lens

D. Under the edge of the lens

9. During lens application, which of the following solutions is recommended to fill the scleral lens bowl?*

A. Biotrue

B. Lacri-Pure

C. Opti-Free Express

D. Boston Advance

10. Which of the following is the BEST option and should be prescribed for scleral lens storage and disinfecting?*

A. Scleral lens filling solution

B. Hydrogen Peroxide disinfecting solution

C. Saline Solution

D. Multipurpose Contact Lens Solution

11. Approximately how much scleral lens settling is expected for a mini-scleral lens?*

A. 400 microns

B. 300 microns

C. 200 microns

D. 100 microns

12. If a scleral lens has spherical peripheral curves and has good alignment at 12 and 6 o’clock, but blanching at 3 and 9 o’clock, what change should be made to the peripheral curves?*

A. Change to toric peripheral curves

B. Flatten the last peripheral curve 360 degrees

C. Steepen the last peripheral curve 360 degrees.

D. Steepen the limbal curve to achieve better corneal clearance.

13. The addition of a Hydra-PEG coating to the surface of a scleral lens will do all the following, except:*

A. Increase lens lubricity

B. Increase lens surface deposits

C. Increase lens surface wettability

D. Increase lens diameter

14. Which of the following scleral lens designs has both toric haptics and front surface toric optics?*

A. Back surface toric scleral lens

B. Spherical scleral lens

C. Front surface scleral lens

D. Bitoric scleral lens

15. If a patient has diffuse corneal staining after lens removal on follow-up, what is the most likely cause?*

A. Inappropriate lens filling solution

B. Corneal touch in a 1 mm area

C. Scleral touch at the limbus

D. Excessive peripheral tightness and blanching

16. A PKP patient should have which additional test performed prior to fitting a scleral lens to limit complications.*

A. Pachymetry

B. Anterior Surface OCT

C. Corneal Topography

D. Endothelial Cell Count

17. What should a patient be instructed to do if bubbles are present under the scleral lens after lens application to the eye?*

A. Nothing

B. Remove and re-apply the lens to the eye

C. Push hard on the lens, on eye to squeeze out the bubbles

D. Blink several times to get the bubbles out

18. A patient is noted to have a pingecula that under the landing zone of a scleral lens resulting in blanching, redness, and discomfort after lens removal. Which of the following is the best way to troubleshoot this issue?*

A. Nothing if the rest of the lens is well aligned

B. Fenestrate the lens

C. Microvault the lens over the pingecula

D. Flatten the periphery of the lens 360 degrees.

19. Conjunctival prolapse is usually the result of which of the following:*

A. Excessive limbal clearance

B. 200 microns of corneal clearance

C. Toric peripheral curves

D. A decentered scleral lens

20. Which area of the sclera is typically the flattest?*

A. Superior

B. Inferior

C. Temporal

D. Nasal

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