Quiz For Prism: A Fresh Angle on the Subject

Many non-optically prisms used are ____________.

Good to make eyeglasses

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Geometrically imperfect

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Always made of glass

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Not available for sale

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What type of prism is specifically created to separate white light into ROYGBIV?

A dispersive prism

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A black prism

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A semi-previous gem prism

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A medical prism

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Which of these is a polarizing prism?

A Nicad

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A Nickel

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A Nicol

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A Nicked

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A 1^ prism will

be used by all patients

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deviate light 1 cm at a distance of 1 meter

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deviate light to 20 feet

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deviate light 1 inch at a distance of 1 mile

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How strong is a prism that will deviate light 1 cm at a distance of 4 meters?

4^

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16^

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1^

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.25^

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What rule calculates how to purposely create prescribed prism?

The Rule of Squares

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A variation of Prentices Rule

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The Rule of Fives

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The Protractor Rule

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What is another term for unwanted prism?

Gross prism

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Variable prism

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Induced prism

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Glass prism

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If the eye is above the optical center of a plus lens, what type of prism is induced?

Base up prism

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No prism

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Unquantified prism

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Base down prism

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If the patient’s right eye is closer to the nose in a plus lens, what direction of prism is induced?

Base up

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Base down

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Base out

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Base in

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What happens when the mechanical PD of a pair of glasses does not match the patient PD?

The patient will experience some level of horizontal prismatic effect

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Nothing

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The patient will seem to be standing on a mound

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The patient will seem to be standing in a hole

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What type of induced prism makes people look shorter?

Base in prism

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Any form of prism

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Base up prism

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Base down prism

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What form of induced prism is unavoidable with many bifocal styles?

Image distortion

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Image jump

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Image hop

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Image warp

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Where is the optical center (OC) located on a round 40 lens?

4 to 5 mm below the seg line

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40 mm below the seg line

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20 mm below the seg line

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There is no standard distance

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Which of these bifocal styles has no image jump?

A round 22

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A FT28

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A FT22

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A Franklin

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Calculate the amount of image jump for this lens: Round 22, -1.00 DS, ADD of 3.00 at a reading distance of 8 mm.

3^ IJ

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8^ IJ

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2.2^ IJ

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No image jump

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What is the correct term for a misaligned eye?

Obtuse

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Strabismus

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Base out

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Base up

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The base of a prism is usually _________ of the deviation of the eye.

Opposite

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Unknown

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Variable

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The same

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Which of these can possibly cause hemianopia?

High blood pressure

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Heart problems

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Brain tumor

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Hyperventilation

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When the prism imbalance is too great, the patient may experience ___________.

Headaches

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No problems

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Facial tics

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Blindness

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A lens has 2/3^ and it has an incorrect PPD variance of 3.0 mm, what does this mean?

The lens is adequate

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The lens fails ANSI standards

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The lens is chipped

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The lens is progressive

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Which combination is an adding prism combination?

BI and BO

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BU and BU

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BD and BD

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BU and BD

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When is horizontal decentration unnecessary?

When the FPD = PPD

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When the patient is getting bifocals

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When the patient has astigmatism

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When the patient has Transitions

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For a lens of Plano -2.00 x 180°, what is the power at 135°?

-2.00

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-4.00

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-0.50

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-1.00

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For horizontal prism to be created on a toric lens, what is true?

This cannot be done

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Calculate the power of the toric lens at 45°

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Calculate the power of the toric lens at 180°

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Calculate the spherical equivalent

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Which statement is true?

Prism must always be achieved by decentration of the lens

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Prism can be built into a lab created lens

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Prism will always warp

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Prism is unsafe

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Which of these is a potential solution for vertical imbalance?

Contact lenses

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Transitions lenses

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Polarized lenses

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AR coating

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To which lens is reverse slab-off applied?

There is no set standard

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To the more minus

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To the more plus

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Always to the left lens

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An optician sees prism in quadrant 1 of a right lens, this indicates:

Base up or down prism

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Base up or in prism

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Base in prism only

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Base down prism only

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Which is a lensometry error that may affect measuring prism?

Forgetting to dust the instrument

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Both eye wires are not resting evenly on the stage

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Prism compensator is correctly adjusted

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Rx is read in the correct form

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Approximately how thick is a Fresnel prism?

3.0 mm

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0.5 mm

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1.0 mm

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0.25 mm

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A Fresnel prism will __________.

Be too heavy to use

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Increase light intensity

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Only be found in a lighthouse

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Be easier to clean

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Approximately ____________ visits to the doctor or hospital today are due to diplopia.

1 million

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3 million

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20,000

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850,000

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Diplopia can be a hallmark of ____________.

Bell's palsy

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Upper respiratory infection

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Kidney infection

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Acne

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Diplopia can limit or prohibit ______________.

Proper sleep

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Manual dexterity

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Driving

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Hearing

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What is true with a basic esophoria or exophoria?

It is never bothersome to a patient

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It is extremely rare

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It is only found in children

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Prism can be used alone or with vision therapy

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What is a possible condition related to right head turn

Left gaze preferred

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Head tilt back

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Chin depressed

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Up gaze preferred

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The Krimsky test will measure ___________________.

Degree of migraine intensity

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Degree of misalignment

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Degree of lens axis

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Degree of corneal protrusion

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What is sometimes used for testing the type of diplopia instead of a Maddox rod?

A PD ruler

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A red lens

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A blue lens

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A pupillometer

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What definitively measures the protrusion of the eye?

An esotometer

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A Maddox test

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A prism exophthalmometer

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The lensometer

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What is one reason that surgery might be an option to correct diplopia?

Prism glasses do not offer sufficient correction

Correct Incorrect Correct answer

The patient used over-the-counter eye drops

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The patient used ready readers

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The patient has heterochromia

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Quiz For Prism: A Fresh Angle on the Subject

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