Quiz For Deductive Diagnostic Optics

1 point(s)

Diplopia is defined as:

A muscular condition that causes an eyeâ€™s gaze to â€œdipâ€ toward the floor

Correct Incorrect Correct answer

A loss of horizontal fusion causing images to â€œrun togetherâ€ horizontally

Correct Incorrect Correct answer

A loss of vertical fusion causing a â€œstackingâ€ of images

Correct Incorrect Correct answer

Both B and C

Correct Incorrect Correct answer

1 point(s)

When a patient remarks that their new eyewear makes the floor seem farther away “like in a valley”:

You should suggest that they consult a neurologist immediately

Correct Incorrect Correct answer

You should use a tape measure to reassure them that the floor is in the same place

Correct Incorrect Correct answer

â€œBase downâ€ prism may be added to the lenses to bring the image back up

Correct Incorrect Correct answer

They are probably describing a type of distortion fairly common when a base curve and/or power change has been prescribed

Correct Incorrect Correct answer

1 point(s)

For our purposes, Occam’s razor is:

A philosophy that indicates that the correct explanation is often found in the most complex, esoteric concepts

Correct Incorrect Correct answer

An obscure hand tool once used to reduce the circumference of a chemically treated glass lens

Correct Incorrect Correct answer

Not relevant to any of the issues discussed

Correct Incorrect Correct answer

A concept that suggests that the simplest, most common explanation is usually the right one

Correct Incorrect Correct answer

1 point(s)

Often, the dispenser must use his/her skills as an interpreter because:

People often get nervous in the presence of professionals and may find it difficult to explain themselves

Correct Incorrect Correct answer

Frustrated patients expect it of them

Correct Incorrect Correct answer

Patients arenâ€™t familiar with technical ophthalmic terms and are unlikely to use them

Correct Incorrect Correct answer

It makes the dispenser seem less intimidating

Correct Incorrect Correct answer

1 point(s)

Upon inspection it is determined that the new progressive multifocal eyewear is badly out of alignment: The left lens is approximately half an inch higher than the right. This could mean:

The patient will be seeing through two different foci

Correct Incorrect Correct answer

The patientâ€™s ear placement is grossly asymmetrical

Correct Incorrect Correct answer

The patient may have difficulty with vertical fusion due to induced prism

Correct Incorrect Correct answer

Both A and C

Correct Incorrect Correct answer

1 point(s)

A simple corrective adjustment:

May often seem like a miraculous solution to a patientâ€™s distress

Correct Incorrect Correct answer

Should be artificially prolonged in order to impress the patient and instill confidence

Correct Incorrect Correct answer

Should be done as carefully as possible to prevent damage to the frame

Correct Incorrect Correct answer

Both A and C

Correct Incorrect Correct answer

1 point(s)

When inspecting “seg” heights:

â€œDâ€ style or flat-top segs are easier to evaluate than â€œblendedâ€ bifocals

Correct Incorrect Correct answer

â€œFranklinâ€ or â€œExecutiveâ€ style segs may be more difficult to measure because of the more pronounced â€œshelvesâ€ or â€œledgesâ€.

Correct Incorrect Correct answer

Both A and B

Correct Incorrect Correct answer

None of the above

Correct Incorrect Correct answer

1 point(s)

When evaluating seg heights in PAL’s

Pay attention to the â€œdropâ€ between center pupil fitting cross and where the progression actually begins.

Correct Incorrect Correct answer

Always use the manufacturerâ€™s markings and â€œcut-outâ€ diagrams to properly locate the seg heights.

Correct Incorrect Correct answer

It is acceptable to use any PAL designâ€™s cut-out charts interchangeably

Correct Incorrect Correct answer

A and C

Correct Incorrect Correct answer

1 point(s)

Completely neutralizing the patient’s prior pair

Is extremely helpful in establishing a basis of comparison between old and new glasses

Correct Incorrect Correct answer

Is not recommended because it is time consuming and often is a basis for a patientâ€™s loss of confidence

Correct Incorrect Correct answer

Has little or no value to our purposes, as we are only concerned with the patientâ€™s problematic new eyewear

Correct Incorrect Correct answer

Can be delegated to an assistant while the primary dispenser continues to interact with the patient

Correct Incorrect Correct answer

1 point(s)

When a long-term wearer of 8X35mm trifocals is switched to bifocals and announces “I can’t see the clock at the end of my desk!”

They are expressing a progressive loss of accommodative amplitude

Correct Incorrect Correct answer

They are most likely discovering that they were routinely using the intermediate segment for this and other similar visual tasks without being conscious of it

Correct Incorrect Correct answer

They should immediately be referred to an ophthalmologist to determine the cause of this apparent sudden visual impairment

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They would surely benefit from an anti-reflective coating

Correct Incorrect Correct answer

1 point(s)

This same trifocal wearer

May be well advised to consider changing back to trifocals

Correct Incorrect Correct answer

Provides the dispenser with an opportunity to discuss the intermediate foci inherent in PALâ€™s, with the caveat that the width of field may seem compromised

Correct Incorrect Correct answer

Both A and B

Correct Incorrect Correct answer

Has severely compromised reserve accommodation, and should never be fit with bifocals

Correct Incorrect Correct answer

1 point(s)

Two differing progressive lens designs are available from two different divisions of the same company. One design has a 2mm “drop” between center pupil fitting cross and the actual beginning of the progressive corridor, the other incorporates a 6mm drop. These variations

Are claimed by the author to be evidence of a lack of standardization in our industry

Correct Incorrect Correct answer

Obviously translates to more comfort to the wearer in the lens with the shorter drop

Correct Incorrect Correct answer

Merely reflects differences in the respective designersâ€™ approach to â€œidealâ€

Correct Incorrect Correct answer

Indicate that the lens with the 6mm drop is an earlier generation design

Correct Incorrect Correct answer

1 point(s)

A patient whose previous PALs incorporated a 2mm drop was fit elsewhere with a new pair with a 6mm drop. By all measures, the new lenses perform admirably for both distance vision and reading, but the patient has a pronounced awareness of the differences in the intermediate portions. You may advise:

That unless the patient must perform many tasks at intermediate distances, they may adapt well in just a short time

Correct Incorrect Correct answer

That their new lenses arenâ€™t â€œinferiorâ€, theyâ€™re just designed differently

Correct Incorrect Correct answer

The patient should return to the dispenser of the new eyewear with the explanation and information that you provided, along with the suggestion that they be â€œre-fitâ€ with a lens more similar to their original 2mm drop design

Correct Incorrect Correct answer

All of the above

Correct Incorrect Correct answer

1 point(s)

The O.S. lens in a pair of successfully worn FT 35mm bifocals needs to be replaced due to lens damage. It is recommended that:

This should never be done, as it is likely to invite problems

Correct Incorrect Correct answer

The vertical â€œO.C. to segâ€ distance of the O.D. lens be carefully measured and duplicated as closely as possible

Correct Incorrect Correct answer

Let the experts at the lab determine the ideal O.C. height based on the lens design and Rx criteria

Correct Incorrect Correct answer

None of the above

Correct Incorrect Correct answer

1 point(s)

It is crucial that a professional career dispenser knows how to calculate the power of a lens in the vertical meridian

Because impressing clients is a key to a dispensaryâ€™s success

Correct Incorrect Correct answer

Because it is important to recognize, and compensate for Rx- induced vertical prism

Correct Incorrect Correct answer

In order to maintain the confidence of their referring physicians

Correct Incorrect Correct answer

Because of the effect it has on horizontal prism

Correct Incorrect Correct answer

1 point(s)

Generally, as the index of refraction of a lens increases

Abbe value decreases and light transmission also decreases due to increased surface reflectance

Correct Incorrect Correct answer

Abbe value increases as well

Correct Incorrect Correct answer

It has a negligible effect on Abbe value

Correct Incorrect Correct answer

The resultant decrease in thickness and weight far outweigh any optical quality considerations

Correct Incorrect Correct answer

1 point(s)

A pair of spectacles is neutralized. When the O.C.s are spotted, the O.S. lens marks 4mm lower than the O.D. The result of this variance may be

It’s impossible to know without first calculating the power of the lenses at 90*

Correct Incorrect Correct answer

Vertical prism induced by unintentional processing errors

Correct Incorrect Correct answer

Vertical prism compensated for by specifying dissimilar O.C. heights to the lab

Correct Incorrect Correct answer

All of the above

Correct Incorrect Correct answer

1 point(s)

Aspheric/atoric curves

Can help diminish the detrimental effects of higher index, lower Abbe lenses

Correct Incorrect Correct answer

Will always result in thinner lenses

Correct Incorrect Correct answer

Both A and B

Correct Incorrect Correct answer

Are always flatter in the periphery than in the center

Correct Incorrect Correct answer

1 point(s)

When choosing a lens material for a new Rx

It is advisable, if possible, to determine the prior lens material, and, unless warranted by a significant Rx change, retain the same material

Correct Incorrect Correct answer

Always suggest the highest index material that will produce the thinnest, lightest lenses

Correct Incorrect Correct answer

Always follow the advice of the technical lens experts at the lab

Correct Incorrect Correct answer

Both B and C

Correct Incorrect Correct answer

1 point(s)

If a patient with a 3.00 diopter cylinder requires a prescription change that rotates her axis from 59* to 48*, it may mean that

The question is irrelevant: It is necessary to ascertain whether the cylinder is in “plus” or “minus” form

Correct Incorrect Correct answer

The patient should tolerate the change well because the astigmatic alignment is less oblique

Correct Incorrect Correct answer

The patient may perceive images as being “bent” or perhaps be slightly disoriented because the astigmatism is more oblique

Correct Incorrect Correct answer

Neither A nor C

Correct Incorrect Correct answer

1 point(s)

A modified/adjusted prescription developed with the prescribers approval may include

Reducing the power of either the spherical or cylindrical component slightly, adhering as closely as possible to accepted industry tolerances

Correct Incorrect Correct answer

Rotating the cylinder axes closer to those of their previous (presumably comfortable) Rx

Correct Incorrect Correct answer

Altering the base curves, lens design, or material

Correct Incorrect Correct answer

All of the above

Correct Incorrect Correct answer

1 point(s)

A prescription reconfigured as described in the previous question

Should provide improved acuity, with less disturbance than the troublesome pair originally processed and dispensed “as written”.

Correct Incorrect Correct answer

Will not improve the patient’s vision because it doesn’t fill the prescription accurately

Correct Incorrect Correct answer

Will not address the patient’s symptoms of disorientation because it varies from the written Rx

Correct Incorrect Correct answer

Both B and C

Correct Incorrect Correct answer

Quiz For Deductive Diagnostic Optics

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