Quiz For Photochromic Lenses

1 point(s)

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10

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20

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30

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40

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1985

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1990

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1995

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2000

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Thin and Dark T

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PhotoGray Extra®

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Transitions III

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Solera by Invicta Vision

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Thin and Dark

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SunSensors

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Solera by Invicta Vision

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Transitions

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infrared

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white

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ultraviolet

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incadescent

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color

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material

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technology

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coating

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1 point(s)

Photochromic lenses are available:

in grey 3 only

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in grey and brown only

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in polycarbonate only

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in a variety of colors

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1 point(s)

Different photochromic lens manufacturers:

utilize the same technology to make their lenses

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utilize different technologies to make their lenses

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produce single vision photochromic lenses only

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produce their lenses in semi-finished form only

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1 point(s)

The “imbibed” process of producing photochromic lenses

draws the photochromic molecules into the lens surface to a depth of 0.15mm

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draws the photochromic molecules into 25% the lens thickness

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draws the photochromic molecules into 50% the lens thickness

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disperses the photochromic molecules evenly throughout the mass of the lens

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1 point(s)

The “in-mass” process of producing photochromic lenses

draws the photochromic molecules into the lens surface to a depth of 0.15mm

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draws the photochromic molecules into 25% the lens thickness

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draws the photochromic molecules into 50% the lens thickness

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disperses the photochromic molecules evenly throughout the mass of the lens

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1 point(s)

Density, refractive index, and ABBE value of in-mass photochromic lenses are all dependent upon:

the lens manufacturer

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the depth of the photochromic molecules used in the imbibed technology

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the percentage of photochromic molecules actually activated

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the lens material

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1 point(s)

___________produces in-mass photochromic lenses

Hoya

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Rodenstock

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Corning

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All of the above

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1 point(s)

All photochromic lenses share the following traits:

They all block potentially harmful UVB rays
They are all made from high index materials
They are all activated by UV wave lengths
They all have low ABBE values

1 & 2

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2 & 3

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1 & 3

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Solera

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1 point(s)

All plastic photochromic lenses

are temperature dependent
darken evenly across the lens surface
become fully activated behind the windshield of a car
return to a clear state at night

1, 2 & 3

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2, 3 & 4

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1, 2, & 4

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1, 2, 3, & 4

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1 point(s)

With _______________photochromic lenses the photochromic action takes place in a thin layer on the front surface of the lens.

imbibed

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low ABBE value

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in-mass

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aspheric

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1 point(s)

To provide realistic expectations for automobile drivers who wish to utilize photochromic lenses as a true sunglass it should be explained:

the lenses will darken completely behind the windshield under all weather conditions

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the lenses will not darken sufficiently on cloudy overcast days

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the lenses will not darken sufficiently under any weather conditions

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the lenses will function equally well both inside and outside of the car

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1 point(s)

The primary difference between surface and in-mass technologies is:

how well the lenses perform behind the windshield of a car

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how well the lens perform in high index materials

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how well the lenses perform over time

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how well the lens perform in polycarbonate

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1 point(s)

The manufacturing process of photochromic lenses relates directly to:

the cost of the lenses

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the thickness of the lenses

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the weight of the lenses

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the optics of the lenses

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1 point(s)

The index of refraction of photochromic lenses relates directly to:

the cost of the lenses

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the thickness of the lenses

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the weight of the lenses

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the optical clarity of the lenses

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1 point(s)

The specific gravity of photochromic materials relates directly to:

the cost of the lenses

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the thickness of the lenses

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the weight of the lenses

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the optical clarity of the lenses

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1 point(s)

Photochromic plastic lenses made with imbibed technology will generally last:

5 to 10 years depending upon the lens thickness

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the lifetime of the lens

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the lifetime of an average prescription

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the lifetime of the patient

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1 point(s)

Which of the following statements is true?

all plastic photochromic lenses will gradually lose their ability to get darker and lighter due to the UV exposure
photochromic lenses never lose their ability to darken and lighten
The organic chemistry inherent in plastic photochromic lenses degrades in the presence of oxygen and radiation
photochromic lenses block potentially harmful UVB radiation

1, 2, & 3

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1, 3, & 4

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2, 3, & 4

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1, 2, 3, & 4

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1 point(s)

Which of the following statements is correct?

Photochromic lenses made from in-mass technology last longer than imbibed technology because when UV degrades the exposed or activated photochromic molecules, other molecules step up to replace those that were lost

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Photochromic lenses made from imbibed technology last longer than in-mass because the imbibed molecules are more sensitive to varying light conditions

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Photochromic lenses made from imbibed and in-mass technology last the same amount of time

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None of the above statements are correct

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1 point(s)

Most consumers in North America prefer_______________lenses.

brown

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amber

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green

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gray

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1 point(s)

Using standard imbibed technology, ______________lenses change to different colors outdoors

Transitions

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Splitz

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SunSensors

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Solera

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1 point(s)

These lenses come in six colors and utilize a coating technology which cause the lenses to become a darker shade when exposed to sunlight.

Transitions

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Splitz

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SunSensors

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Solera

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1 point(s)

A lifestyle questionnaire for the patient to answer can

engage your patients into thinking about the importance and use of eyewear in their life

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express the patient's eyewear needs in very specific ways

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develop an increased understanding of demands in the areas of occupation, recreation, sports and hobbies

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all of the above

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1 point(s)

To ensure the patient has realistic expectations regarding their new photochromic lenses the following important facts need to be pointed out:

photochromic lenses will never wear out
photochromic lenses do not completely darken behind the windshield of a car
tinted photochromic lenses may not be suitable for night driving
photochromic lenses are not available in progressive lens designs

1 & 2

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2 & 3

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3 & 4

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2, 3, & 4

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1 point(s)

When presenting photochromic lenses to the patient it’s best to:

demonstrate lenses in a real life environment
show the lenses in the darkened state first
discuss the importance and value of lens coatings
always use UV lamps when possible

1 & 2

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2 & 3

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1 & 3

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3 & 4

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1 point(s)

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are slightly lighter in the darkened state than non AR coated lenses

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are slightly darker in the darkened state than non AR coated lenses

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change color more quickly

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AR coating has no effect on the photochromic properties

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