59 ICLEP Session 1

1. 1.Corneal sensation decreases when:

• a. Oxygen decreases to <8%

• b. Oxygen increases to >8%

• c. CO2 increases to >8%

• d. Oxygen have no role

2.

When the base curve constant of a contact lens and the diameter increases, what typically happens to the fit of the lens?

• A) The fit becomes tighter/steep

• B) The fit becomes looser/flat

• C) The fit remains unchanged

• D) The fit becomes uncomfortable and irritating

3. 3.Multifocal CL for presbyopia have:

• a. Centre near design

• b. Centre distance design

• c. Centre is zero power 

• d. Centre power changes with accommodation

4.What type of prosthetic soft contact lens would be appropriate for total corneal scar with no useful vision?

• Type C

• Type O

• Type B

• Type D

5.What type of prosthetic soft contact lens can be prescribed for amblyopia patching therapy?

• a.Type A/Type C

• b.Type C/Type B

• c.Type A/Type B

• d.Type D/Type B