Quiz For Deductive Diagnostic Optics

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Question 1 of 22

1. Question
1 point(s)
Diplopia is defined as:
- A muscular condition that causes an eyeâ€™s gaze to â€œdipâ€ toward the floor
- A loss of horizontal fusion causing images to â€œrun togetherâ€ horizontally
- A loss of vertical fusion causing a â€œstackingâ€ of images
- Both B and C
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Question 2 of 22

2. Question
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
- You should use a tape measure to reassure them that the floor is in the same place
- â€œBase downâ€ prism may be added to the lenses to bring the image back up
- They are probably describing a type of distortion fairly common when a base curve and/or power change has been prescribed
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Question 3 of 22

3. Question
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
- An obscure hand tool once used to reduce the circumference of a chemically treated glass lens
- Not relevant to any of the issues discussed
- A concept that suggests that the simplest, most common explanation is usually the right one
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Question 4 of 22

4. Question
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
- Frustrated patients expect it of them
- Patients arenâ€™t familiar with technical ophthalmic terms and are unlikely to use them
- It makes the dispenser seem less intimidating
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Question 5 of 22

5. Question
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
- The patientâ€™s ear placement is grossly asymmetrical
- The patient may have difficulty with vertical fusion due to induced prism
- Both A and C
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Question 6 of 22

6. Question
1 point(s)
A simple corrective adjustment:
- May often seem like a miraculous solution to a patientâ€™s distress
- Should be artificially prolonged in order to impress the patient and instill confidence
- Should be done as carefully as possible to prevent damage to the frame
- Both A and C
Correct

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Question 7 of 22

7. Question
1 point(s)
When inspecting “seg” heights:
- â€œDâ€ style or flat-top segs are easier to evaluate than â€œblendedâ€ bifocals
- â€œFranklinâ€ or â€œExecutiveâ€ style segs may be more difficult to measure because of the more pronounced â€œshelvesâ€ or â€œledgesâ€.
- Both A and B
- None of the above
Correct

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Question 8 of 22

8. Question
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.
- Always use the manufacturerâ€™s markings and â€œcut-outâ€ diagrams to properly locate the seg heights.
- It is acceptable to use any PAL designâ€™s cut-out charts interchangeably
- A and C
Correct

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Question 9 of 22

9. Question
1 point(s)
Completely neutralizing the patient’s prior pair
- Is extremely helpful in establishing a basis of comparison between old and new glasses
- Is not recommended because it is time consuming and often is a basis for a patientâ€™s loss of confidence
- Has little or no value to our purposes, as we are only concerned with the patientâ€™s problematic new eyewear
- Can be delegated to an assistant while the primary dispenser continues to interact with the patient
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Question 10 of 22

10. Question
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
- 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
- They should immediately be referred to an ophthalmologist to determine the cause of this apparent sudden visual impairment
- They would surely benefit from an anti-reflective coating
Correct

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Question 11 of 22

11. Question
1 point(s)
This same trifocal wearer
- May be well advised to consider changing back to trifocals
- 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
- Both A and B
- Has severely compromised reserve accommodation, and should never be fit with bifocals
Correct

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Question 12 of 22

12. Question
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
- Obviously translates to more comfort to the wearer in the lens with the shorter drop
- Merely reflects differences in the respective designersâ€™ approach to â€œidealâ€
- Indicate that the lens with the 6mm drop is an earlier generation design
Correct

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Question 13 of 22

13. Question
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
- That their new lenses arenâ€™t â€œinferiorâ€, theyâ€™re just designed differently
- 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
- All of the above
Correct

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Question 14 of 22

14. Question
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
- The vertical â€œO.C. to segâ€ distance of the O.D. lens be carefully measured and duplicated as closely as possible
- Let the experts at the lab determine the ideal O.C. height based on the lens design and Rx criteria
- None of the above
Correct

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Question 15 of 22

15. Question
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
- Because it is important to recognize, and compensate for Rx- induced vertical prism
- In order to maintain the confidence of their referring physicians
- Because of the effect it has on horizontal prism
Correct

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Question 16 of 22

16. Question
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
- Abbe value increases as well
- It has a negligible effect on Abbe value
- The resultant decrease in thickness and weight far outweigh any optical quality considerations
Correct

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Question 17 of 22

17. Question
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*
- Vertical prism induced by unintentional processing errors
- Vertical prism compensated for by specifying dissimilar O.C. heights to the lab
- All of the above
Correct

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Question 18 of 22

18. Question
1 point(s)
Aspheric/atoric curves
- Can help diminish the detrimental effects of higher index, lower Abbe lenses
- Will always result in thinner lenses
- Both A and B
- Are always flatter in the periphery than in the center
Correct

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Question 19 of 22

19. Question
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
- Always suggest the highest index material that will produce the thinnest, lightest lenses
- Always follow the advice of the technical lens experts at the lab
- Both B and C
Correct

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Question 20 of 22

20. Question
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
- The patient should tolerate the change well because the astigmatic alignment is less oblique
- The patient may perceive images as being “bent” or perhaps be slightly disoriented because the astigmatism is more oblique
- Neither A nor C
Correct

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Question 21 of 22

21. Question
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
- Rotating the cylinder axes closer to those of their previous (presumably comfortable) Rx
- Altering the base curves, lens design, or material
- All of the above
Correct

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Question 22 of 22

22. Question
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”.
- Will not improve the patient’s vision because it doesn’t fill the prescription accurately
- Will not address the patient’s symptoms of disorientation because it varies from the written Rx
- Both B and C
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Quiz For Deductive Diagnostic Optics

Quiz For Deductive Diagnostic Optics

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