Analyze and Interpret Information

Question 1

You, the fitter, need to place the lens on the patient’s eye first for the initial evaluation. Allow the lens to settle for about 20 minutes for the initial evaluation. Then if everything is on the correct course, wait about another 30 minutes for adaptation, and then evaluate the lens.
(True/False)

Answer 1

The first statement is true. The last two statements are false

Question 2

___ allows you to evaluate the lens/cornea relationship, the lens centration as well as the lens movement.

Answer 2

Fluorescein

Question 3

Fluorescein is evaluated with the use of a ___.

Answer 3

Cobalt filter

Question 4

Fluorescein temporarily stains tears but will not stain ___ since the fluorescein is a water-soluble molecule that doesn’t penetrate intact lipid cell membranes.

Answer 4

Intact epithelial cells

Question 5

The depth of the tear layer under the lens can be evaluated by color. The deeper the layer of tears, ___. The less the tear layer, ___.

Answer 5

The brighter the fluorescent green color
The less fluorescent green and area appears darker

Question 6

This fluorescein pattern indicates a ___ lens-cornea relationship.

Answer 6

Steep

Question 7

This fluorescein pattern indicates a ___ lens-cornea relationship.

Answer 7

Steep

Question 8

This fluorescein pattern indicates a ___ staining pattern.

Answer 8

With-the-rule astigmatism

Question 9

This fluorescein pattern indicates a ___ staining pattern.

Answer 9

Against-the-rule astigmatism

Question 10

Given the position of the inferior lid in relation to the lower limbus, which design of multifocal contact lens would you suggest?

Answer 10

Aspheric

Question 11

Given the K’s 42.00 @ 180/42.50 @ 090, and manifest Rx of -1.00 -0.50 x 180, and your patient wants to wear their lenses only on the weekends, which lens type would you
suggest?

Answer 11

Soft spherical

Question 12

People who are heavy surface depositors may benefit from the use of

Answer 12

Daily disposables lenses

Question 13

A soft lens should have a curve and diameter that will allow it to ___.

Answer 13

Drape the cornea, vault over the limbus, and extend approximately 1.0mm onto the sclera.

Question 14

To do a spherical equivalent ___.

Answer 14

take half of the cylinder and algebraically add it to the sphere power, vertex as necessary, and that is your beginning power.

Question 15

In fitting soft contact lenses, we allow the lens to equilibrate. What does this mean?

Answer 15

The fluid in the lens is exchanged with the patient’s own tears, which will allow for a more accurate evaluation.

Question 16

In observing a soft contact lens on a patient’s eye in a keratometer, the following image pattern could indicate a lens that is ___.

Answer 16

Too flat

Question 17

Given a lens that demonstrates a lift on the edge, you may determine that the lens is ___.

Answer 17

Too flat

Question 18

Soft toric contact lenses may have scribe marks on them. What are they used for?

Answer 18

To determine if the lens is aligned correctly on the cornea.

Question 19

Given a manifest Rx of -2.50 -1.25 x 180. You place a diagnostic lens on the eye with the same power and axis, and the alignment markings are 30 degrees to the left, but if you gently rotate the lens the patient sees well, what should you do?

Answer 19

Order a lens with the power -2.50 -1.25 x 030.

Question 20

As you instruct your patient regarding insertion, removal, cleaning, and care for their lenses, they indicate that they may like to switch solutions. What do you say/do?

Answer 20

Explain to them that their care system, as well as their lenses, have been selected for them based on what will work with their lenses, as well as their history, and they should not switch as there could be complications with either their lenses or their eyes or both.