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OPT 601 > Final Exam > Flashcards

Final Exam Flashcards

1
Q

A multi-layer antireflection coating on the front surface of a lens would create what color of reflection?

A

Blue/Green

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2
Q

True or false: hot temperature and presence of UV light will increase the effectiveness of a photochromic lens.

A

False; UV will indeed increase the effectiveness, and cold temperature (but not hot) will also increase the effectiveness.

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3
Q

The following statement is related most closely to which US agency or organization?

Recommends ophthalmic products for certain sports.

A

ASTM (American Society for Testing & Materials)

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4
Q

A single layer antireflection coating on the front surface of a lens would create what color of reflection?

A

Purple

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5
Q

How would you change the following parameters to decrease a patient’s awareness of a ring scotoma from their glasses?

Lens power
Vertex distance
Lens size
Pupil size
Lens thickness
Base curve
A 
Lens power: decrease
Vertex distance: decrease
Lens size: increase
Pupil size: increase
Lens thickness: decrease
Base curve: decrease
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6
Q

What is the definition of the Petzval surface?

A

The surface where the tangential and sagittal foci will coincide when a lens is fully corrected for oblique astigmatism.

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7
Q

What type of light is normally absorbed by the ozone layer?
Infrared, visible, UV-A, UV-B, UV-C

A

UV-C

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8
Q

True or false: horizontal and vertical prism imbalance are lens parameters that apply even if they are not specified in the prescription.

A

True.

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9
Q

Which Zernike coefficient corresponds to a blur of about 0.25D?

A

0.33 microns

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10
Q

Comparing the drop-ball standards for dress lenses to safety lenses, in which of the following categories are the standards the same?
Projectile size, projectile weight, drop height

A

Drop height (no less than 127 cm [50 inches])

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11
Q

How would you change the following parameters to increase a patient’s awareness of a ring scotoma from their glasses?

Lens power
Vertex distance
Lens size
Pupil size
Lens thickness
Base curve
A 
Lens power: increase
Vertex distance: increase
Lens size: decrease
Pupil size: decrease
Lens thickness: increase
Base curve: increase
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12
Q

The following statement is related most closely to which US agency or organization?

Prohibits the inclusion of a disclaimer on a prescription provided to a patient.

A

FTC (Federal Trade Commission)

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13
Q

Comparing the drop-ball standards for dress lenses to safety lenses, in which of the following categories are the standards different?
Projectile size, projectile weight, drop height

A

Projectile size (5/8” for dress, 1” for safety) and projectile weight

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14
Q

The following statement is related most closely to which US agency or organization?

Requires a manufacturer to verify that a lens meets impact resistance requirements.

A

FDA (Food & Drug Administration)

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15
Q

What type of light produces the sensation of warmth? Infrared, visible, UV-A, UV-B, UV-C

A

Infrared

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16
Q

The following statement is related most closely to which US agency or organization?

Recommends tolerance on the manufacture of prescription ophthalmic products.

A

ANSI (American National Standards Institute)

17
Q

What type of light includes the wavelengths of lasers used for refractive surgery?
Infrared, visible, UV-A, UV-B, UV-C

A

UV-C

18
Q

The following statement is related most closely to which US agency or organization?

Requires the release of the prescription to the patient at the end of the examination.

A

FTC (Federal Trade Commission)

19
Q

The following statement is related most closely to which US agency or organization?

Regulates ophthalmic products in educational settings.

A

OSHA (Occupational Safety & Health Administration)

20
Q

What type of light causes solar retinopathy?

Infrared, visible, UV-A, UV-B, UV-C

A

Visible

21
Q

True or false: base curve and center thickness are lens parameters that apply even if they are not specified in the prescription, in terms of amount of error the glasses may contain.

A

False; these apply only when specified in the prescription.

22
Q

The following statement is related most closely to which US agency or organization?

Requires the dispenser to maintain all records pertaining to the sale of eyewear for at least 3 years.

A

FDA (Food & Drug Administration)

23
Q

What type of light causes cataracts with long-term exposure?
Infrared, visible, UV-A, UV-B, UV-C

A

UV-A

24
Q

What type of light is typically not absorbed by ocular tissues?
Infrared, visible, UV-A, UV-B, UV-C

A

Infrared

25
Q

What type of light causes photokeratitis with short-term exposure?
Infrared, visible, UV-A, UV-B, UV-C

A

UV-B

OPT 601 (1 decks)

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