Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Volume 2 Course# OCPP 102 > Presbyopia-multi focal-progressive lenses > Flashcards

Presbyopia-multi focal-progressive lenses Flashcards

1
Q

The ability of the eye to variably focus is known as—

A

accommodation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Which structure of the eye provides it with variable focusing capability?

A

the crystalline lens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How much accommodative ability does the average person have at birth?

A

15.00D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Reading the mean line of the Accommodative Ability by Age Chart, what accommodative amplitude does the average person have at age 44?

A

4.00D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the definition of presbyopia?

A

The inability to see near objects clearly and comfortably

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

As a person ages, their near point—-

A

Recedes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What percentage of the US population is estimated to become presbyopic by the year 2020?

A

42%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

According to US Census data projected to 2050, which is the only age group that will show an increase in number?

A

55+

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What percentage of the current US population over the age of 55 needs eyewear?

A

84%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

As a practicing optician, your role with presbyopic patients will be to determine their lifestyle needs and wants in order to ——-

A

Match product features and benefits to them

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What was the earliest form of presbyopic lens correction?

A

Single vision lenses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Who is attributed with the concept of correcting presbyopia with bifocals?

A

Benjamin Franklin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What was the design of the first bifocals lenses?

A

Two differently powered lens halves secured in the same eye wire

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Which of the following was NOT a problem associated with August Morcks cemented bifocal lenses?

A

The difference indices between the distance lens and the wafer lens caused color aberration for the wearer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Which glass bifocal lens design was the first to use a fusing process?

A

The Kryptok

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Which bifocal lens exhibited color aberration for the wearer through the segment?

A

The Kryptok

17
Q

When was the first trifocal lens developed?

A

1936

18
Q

What is the furthest and closest a person will be able to see if he is looking through a plano distance, +2.50 add multifocal and has 4.00D of accommodative amplitude?

A

40cm to 15.4cm

19
Q

For a specified distance Rx power, what happens to the ranges of clear vision through a segmented multifocal as add powers get high?

A

The zones shrink

20
Q

Which of the following is a significant indication of the Ranges of Clear Vision Through Multifocals Chart?

A

Fixed power zone segmented lenses may not be the best way to correct presbyopia

21
Q

Why did progressive addition lenses take so long to enter the marketplace from the time they were first theorized?

A

The technology needed to produce them was not available

22
Q

The blended region between the distance and near zones of a progressive addition lens is known as the —– zone

A

Intermediate

23
Q

When a lens has its surface astigmatism concentrated into smaller areas of the lens, it is classified as —- design

A

hard

24
Q

Which progressive lens design classification do most manufacturers use?

A

A combination of hard and soft

25
Q

Who designed the first progressive addition lens?

A

Bernard Maitenaz

26
Q

How did the original Varilux lens use aspheric power?

A

It used all its progressive power in 12mm

27
Q

How did the Varilux II lens use aspheric power?

A

The lens was completely progressive from top to bottm

28
Q

Which progressive addition lens was the first to employ true right and left blanks?

A

Varilux

29
Q

What is the advantage of using multi-design for progressive addition lenses?

A

The lens design changes as add power increases based on the intended needs of the wearer as they age

30
Q

What does this diagram illustrate?

A

Asymmetrical design

31
Q

What is the advantage of a short corridor progressive design?

A

It allows the use of shallow B measurement frames

32
Q

What is the best method for assessing the potential success of a progressive addition lens?

A

Wearer

33
Q

All early progressive addition lenses were designed for —-

A

general use

34
Q

What is the name of the software flies used by direct-to-surface (free-form) generators?

A

Point files

35
Q

Why should you have the lens markings on a progressive lens at the time of delivery adjustment?

A

So, you can accurately align the fitting cross with the pupil center

36
Q

What is the name of this location? 37

A

Distance verification circle

37
Q

What is the name of this location?

A

Fitting cross

Volume 2 Course# OCPP 102 (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions