59th ICLEP Session 4

1.Which one of the following modalities is not for myopia control?

• A) Orthokeratology

• B) Single Vision Contact lenses

• C) Extended Depth of Focus Contact lenses

• D) Multi Focal Contact lenses

2.What is the mechanism of myopia control with orthokeratology?

• A) Relative peripheral hyperopia due to center flattening and mid peripheral steepening

• B) Relative peripheral hyperopia due to center steepening and mid peripheral flattening

• C) Relative peripheral myopia due to center flattening and mid peripheral steepening

• D) Relative peripheral myopia due to center steepening and mid peripheral flattening

3.Which of the following describes the purpose of Orthokeratology (Ortho-K) lenses?

• a) To correct nearsightedness

• b) To correct farsightedness

• c) To reshape the cornea and improve vision temporarily

•  d) To permanently correct astigmatism

4.What is the typical usage pattern for Orthokeratology (Ortho-K) lenses?

• a) Worn during the day and removed at night

• b) Worn continuously for extended periods

• c) Worn only during physical activities

• d) Worn at night to reshape the cornea and improve vision during the day

5.What is the design of the Ortho K lens ? 

• A. Prolate design 

• B. Oblate design 

• C. Spherical design 

• D. Reverse geometry design