Question

What does the term washing out mean in Ortho-K fitting?

a) Loss of lens disinfection effectiveness
b) Reduction in lens comfort over time
c) Diminished corneal reshaping effect
d) Increased tearing due to lens movement

Answer 1

In Ortho-K fitting, washing out refers to the diminishing corneal reshaping effect of the contact lens over time.

Step-by-step explanation:

In Ortho-K fitting, the term washing out refers to the diminishing corneal reshaping effect of the contact lens over time. When a person wears Ortho-K lenses overnight, they reshape the cornea to correct vision temporarily. However, the changes to the cornea can gradually fade away during the day, and this is known as washing out.

For example, if a person wears Ortho-K lenses and experiences clear vision in the morning, but their vision gradually becomes blurry throughout the day, it suggests that the lens effect is washing out over time.

Therefore, the correct answer is option c) Diminished corneal reshaping effect.