NOCE Contact Lens Fitting and Care

Question 1

Which measurement is most critical when fitting a spherical soft contact lens for proper centration and comfort?

Accepted Answer

Horizontal visible iris diameter (HVID)

Answer

Pupil diameter

Answer

Palpebral aperture height

Answer

Corneal curvature only

Question 2

A patient presents with a base curve of 7.80 mm on their current contact lens and complains of lens tightness. What adjustment should be made?

Accepted Answer

Increase the base curve to 8.00 mm

Answer

Decrease the base curve to 7.60 mm

Answer

Increase the lens diameter

Answer

Switch to a toric lens

Question 3

What does a fluorescein pattern showing central pooling (dark ring around center) indicate in a rigid gas permeable (RGP) lens fit?

Accepted Answer

Steep fit

Answer

Flat fit

Answer

Optimal alignment fit

Answer

Edge lift issue

Question 4

Which contact lens wearing schedule requires the most stringent patient education regarding infection risk?

Accepted Answer

Extended wear (overnight)

Answer

Daily disposable

Answer

Monthly replacement daily wear

Answer

Biweekly replacement daily wear

Question 5

A patient with presbyopia wants contact lenses. Which design uses different optical zones on a single lens to provide both distance and near vision?

Accepted Answer

Simultaneous vision multifocal

Answer

Monovision

Answer

Bifocal spectacle

Answer

Translating bifocal soft lens

Question 6

What is the primary purpose of the lens edge lift in an RGP contact lens fit?

Accepted Answer

To allow tear exchange and lens movement

Answer

To increase center thickness

Answer

To correct astigmatism

Answer

To improve UV protection