Question 1

Which of the following should not be used when cleaning a refractor's lenses?&#10;A)Alcohol&#10;B)Ether&#10;C)Ammonia-containing cleaner&#10;D)Lint-free cloth

Accepted Answer

Ammonia-containing cleaner
Ammonia or ammonia-containing cleaners should never be used to clean a refractor's lenses. Ammonia will corrode the lens coating. Instead, a lint-free cloth, slightly moistened with alcohol or ether, will do. The lenses can be dried with a tissue.

Question 2

Circular optical elements should be cleaned with what type of motion?&#10;A)Up and down&#10;B)Spiral&#10;C)Side to side&#10;D)Does not matter

Accepted Answer

Spiral
Circular optical elements should be cleaned with a spiral motion. Start at the center and spiral out in order to avoid wiping dirt onto the area already cleaned.

Question 3

When not in use, the keratometer should be protected by which of the following?&#10;A)A dust cover&#10;B)A lens cap&#10;C)Placing it in a dark room&#10;D)None of the above

Accepted Answer

A dust cover
When not in use, the keratometer should be protected by a dust cover. If the keratometer is continuously exposed to dirt and dust, the mire imagery will be diminished or contain unwanted artifacts.

Question 4

How often should an applanation tonometer's calibration be checked?&#10;A)Every week&#10;B)Every 2 months&#10;C)Every year&#10;D)Every 6 months

Accepted Answer

Every 2 months
With regular use, an applanation tonometer's calibration should be checked every 2 months. A calibration bar is used to discern how much the tonometer head moves at each stop of the measuring drum.

Question 5

Before attempting to replace an instrument's bulb, what precaution should be taken?&#10;A)Wear latex gloves&#10;B)Notify the manufacturer&#10;C)Disconnect it from all electrical power sources&#10;D)Work with a team

Accepted Answer

Disconnect it from all electric power sources
Before attempting to replace an instrument's bulb, it is advised to disconnect it from all electrical power sources. This is a straightforward precaution that should be taken in order to avoid injury as a result of electrocution.

Question 6

What is the first thing you should check if the alignment target appears blurry on a tonometer?&#10;A)Check calibration&#10;B)Level the surface it is resting on&#10;C)Call the manufacturer&#10;D)Clean the annular aperture of the objective

Accepted Answer

Clean the annular aperture of the objective
The first thing you should check if the alignment target appears blurry on a tonometer is the annular aperture of the objective. The annulus can accumulate oil from patients' eyelashes and cause a blurry alignment target. It can be cleaned with a dry, cotton-tipped stick.

Question 7

To ensure a correct reading, a lensometer's prism compensator should always be set to&#10;A)0)5 dpt.&#10;B)0 dpt.&#10;C)25 dpt.&#10;D)1 dpt.

Accepted Answer

0 dpt.
To ensure a correct reading, a lensometer's prism compensator should always be set to 0 dpt.

Question 8

Avoid using what chemical when cleaning a phoropter?&#10;A)Alcohol&#10;B)Ether&#10;C)Water&#10;D)Lens tissue

Accepted Answer

Alcohol
Avoid using alcohol on any part of the phoropter. Alcohol will damage the lenses on the instrument. Lenses can be cleaned with an ear syringe.

Question 9

If streaks are visible on a projection screen, what should be done in order to alleviate the problem?&#10;A)Buy a new screen&#10;B)Clean the projector's focusing bulb&#10;C)Change the projector's bulb&#10;D)Restart the projector

Accepted Answer

Clean the projector's focusing bulb
If streaks are visible on a projection screen, the projector's focusing bulb should be cleaned. The most common cause for streaks on a projection is improper cleaning. If the focusing bulb or glass slides are cleaned with a moist cloth, the streaks that are left behind will be projected on to the screen.

Question 10

A phoropter should be serviced every&#10;A)5 years.&#10;B)3 months.&#10;C)12 to 16 months.&#10;D)20 months.

Accepted Answer

12 to 16 months.
A phoropter should be serviced every 12 to 16 months.

Question 11

Which of the following should be recorded?&#10;A)Instrument repairs&#10;B)Instrument maintenance&#10;C)Instrument safety checks&#10;D)Al of the above

Accepted Answer

The answer of Which of the following should be recorded?&#10;A)Instrument...

Question 12

If an instrument with moving parts requires lubrication, what substance can be used?&#10;A)Peanut butter&#10;B)Petroleum jelly&#10;C)Motor oil&#10;D)Molasses

Accepted Answer

The answer of If an instrument with moving parts requires...

Question 13

If the joystick of a slit-lamp biomicroscope becomes difficult to move even after cleaning it, what is a good solution?&#10;A)Applying sewing machine oil to the pad&#10;B)Moving it in a circular motion until it becomes loose&#10;C)Applying grease to the pad&#10;D)None of the above

Accepted Answer

The answer of If the joystick of a slit-lamp biomicroscope...

Question 14

How often should a tonometer's head be cleaned?&#10;A)Once a day&#10;B)Once an hour&#10;C)After each patient&#10;D)Once a month

Accepted Answer

The answer of How often should a tonometer's head be...

Question 15

The SLI light on the tonometer has gone out. Who should replace it?&#10;A)A physician&#10;B)A knowledgeable ophthalmic assistant&#10;C)A patient&#10;D)A qualified service technician

Accepted Answer

The answer of The SLI light on the tonometer has...

Question 16

Before replacing the bulb in a projector, it must have been&#10;A)not recently replaced.&#10;B)turned off for a few minutes prior.&#10;C)unplugged.&#10;D)B and C.

Accepted Answer

The answer of Before replacing the bulb in a projector,...

Deck 7: Medical Equipment