61st ICLEP Day 2

Q1. Which of the following are Rose-K corneal lens designs?

• A. K2

• B. Post-Graft

• C. IC

• D. All of the above

Q2. In cases of high anisometropia, Ortho-K lenses may help by

• A) Equalizing corneal curvature

• B) Reducing retinal disparity and improving binocular function

• C) Decreasing contrast sensitivity

• D) Thickening the corneal epithelium

Q3. How many steps are there in the Rose-K fitting procedure?

• A. 5 steps

• B. 4 steps

• C. 3 steps

• D. 2 steps

Q4. What is the primary mechanism through which Ortho-K lenses control myopia progression?

• A) Decreasing axial length

• (B) Improving tear film quality

• (C) Increasing corneal thickness

• (D) Flattening the central cornea and inducing peripheral myopic defocus

Q5. Which topography pattern is expected after successful Ortho-K treatment?

• A) Central steepening and peripheral flattening

• B) Central flattening with mid-peripheral steepening

• C) Uniform corneal steepening

• D) No change in corneal shape

Q6. Which one of the following is used for measuring the corneal hysteresis?

• A. Ocular surface analyser

• B. Placido's Disk based topography

• C. Slit scanning technology based topography

• D. Anterior Segment OCT

Q7. Which one of the following interpretations is used to measure the thickness of the cornea using corneal topography?

• A. Hot colours indicate a thicker cornea

• B. Hot colours indicate a thinner cornea

• C. Cool colours indicate a thicker cornea

• D. Cool colours indicate a thinner cornea

Q8. Which one of the following statements is NOT TRUE?

• A. Tangential maps are used to determine the overnight centration of the lens

• B. Axial maps are used to assess the optical state of a cornea

• C. Axial maps are used to follow up the progression of the refractive change

• D. Tangential maps are used to measure the corneal surface from a reference plane

Q9. What near addition should be incorporated into the contact lens prescription for a 2-year-old aphakic child, whose full distance-corrected contact lens power is +32.00 D? What will be the final contact lens power for near vision?

• A) +35.00 Dsph

• B) +34.00 Dsph

• C) +33.00 Dsph

• D) +38.00 Dsph

Q10. In a thin cornea case, what baseline investigation is essential before fitting Ortho-K?

• A) Visual acuity

• B) Corneal topography and pachymetry

• C) Refraction only

• D) Schirmer’s test