CPOT Contact Lens Fitting & Patient Care 2

Question 1

What does keratometry (K-readings) measure during a contact lens fitting evaluation?

Accepted Answer

Curvature of the anterior corneal surface

Answer

Pupil diameter under dim illumination

Answer

Intraocular pressure in mmHg

Answer

Anterior chamber depth in millimeters

Question 2

In contact lens fitting terminology, what does a 'steep' fit indicate?

Accepted Answer

The lens base curve is more curved than the corneal curvature

Answer

The lens base curve is flatter than the corneal curvature

Answer

The lens diameter is larger than the corneal diameter

Answer

The lens power is stronger than the manifest refraction

Question 3

Which dye, viewed under cobalt blue light, is used to evaluate the tear film pattern beneath RGP contact lenses?

Accepted Answer

Sodium fluorescein

Answer

Rose Bengal

Answer

Lissamine Green

Answer

Methylene Blue

Question 4

What does the acronym 'LARS' stand for in toric soft contact lens fitting?

Accepted Answer

Left Add, Right Subtract

Answer

Left And Right Stabilization

Answer

Lens Alignment Reference System

Answer

Low Axis Rotation Standard

Question 5

What is the recommended contact lens movement with each blink during a soft lens fitting assessment?

Accepted Answer

0.25 to 1.0 mm

Answer

Less than 0.1 mm (essentially no movement)

Answer

2.0 to 3.0 mm

Answer

4.0 to 5.0 mm

Question 6

What does 'HVID' stand for in the context of contact lens fitting?

Accepted Answer

Horizontal Visible Iris Diameter

Answer

High Visual Image Distance

Answer

High-Volume Iris Dimension

Answer

Horizontal Visual Inspection Data

Question 7

What is the purpose of performing an 'over-refraction' during a contact lens fitting?

Accepted Answer

To identify any residual refractive error beyond what the trial lens corrects

Answer

To determine the corneal curvature for base curve selection

Answer

To measure the required change in lens diameter

Answer

To assess whether a different base curve is needed