Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Procedures > Accomodation > Flashcards

Accomodation Flashcards

1
Q

What is the accommodative system?

A

Focusing of the eye

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

What is the oculomotor system?

A

How the two eyes work together

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

What is functional evaluation?

A

Evaluation of the accommodative and oculomotor systems

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

What is accommodation?

A

The adjustment of the dioptric power of the eye beyond its static resting power brought about by a change in the shape of the crystalline lens

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

What is the stimulus to accommodation?

A

An out of focus retinal image or blur

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

What is the near triad?

A

Accomodation increase
Miosis
Convergence

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

What is tonic accommodation?

A

Resting or passive state in the absence of accommodative stimulus

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

When is the eye in tonic accommodation?

A

In complete darkness or looking at a bright empty field

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

What does an emmetropic eye become in tonic accommodation?

A

Myopic

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

What causes accommodation to a more distant stimulus from resting state?

A

Sympathetic response to blur

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

What causes accommodation to a more near stimulus from resting state?

A

Parasympathetic response to blur

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

How can you stimulate accommodation?

A

By placing the object at a distance closer than infinity
By using minus lenses
By using a combination of distance and lenses

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

With an object at 40 cm from the spectacle plane, what is the stimulus to accommodation?

A

2.50D

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

What is a haploscope?

A

Instrument that measure accommodative response

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

How is the accommodative response described clinically?

A

With regard to the dioptric accommodative stimulus

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

Amplitude of accommodation

A

Maximum amount of accommodative power an eye can exert measured in diopters

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Facility of accommodation

A

Ability of the eye to quickly and aaccurately shift the accommodative posture

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Lag of accommodation

A

The distance in diopters between the object of regard and the actual current position of accommodation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is the considered norm of lag of accommodation?

A

The accommodative response to be less than the accommodative stimulus (demand)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Range of accommodation

A

Linear distance in cm over which one’s accommodative power allows maintenance of clear vision, from the near point to the far point

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

T/F Range of accommodation is alwasy real

A

False, uncorrected hyperope will have a partially virtual range

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Presbyopia

A

Refractive condition in which the accommodative ability of the eye becomes insufficient for satisfactory near vision without the use of corrective plus lenses

23
Q

When is accommodative testing not done?

A

On presbyopes or when the refractive error is not maximally corrected

24
Q

What are the 4 tests for evaluating amplitude of accommodation?

A

Hoffstetter’s formulas
Donder’s age referenced table
The push-up test
Minus lens to blur test

25
Hoffstetter's formulas
Minimum: 15-0.25xage Average: 18.5-0.30xage Maximum:25-0.40xage
26
What is the gold standard for evaluating amplitude of accommodation?
The push-up test
27
How much greater are the binocular amplitudes compared to the monocular amplitudes on average for the push up test?
0.50D
28
What is the near point of accommodation?
A linear measurment from the stoppedd position of the push-up stick to the patients spectacle plane
29
When do you stop moving the push-up stick closer?
When the letters become and remain blurry
30
What is the minification factor?
The letters for the minus lens to blur test get smaller due to the increase in minus lenses and a stationary target
31
What is the difference in amplitde of accommodation between the push-up test and the minus lens to blur test?
2D less for the minus lens test
32
What is the endpoint for the minus lens to blur test?
First sustained blur when the target cannot be cleared
33
What is the total amplitude of accommodation from the minus blur test?
Amount of minus lenses added plus the accommodative demand for the near point card (2.50D)
34
What are the two methods for evaluating the facility of accommodation?
The lens flipper test | The near-far test
35
What is the gold standard test for facility of accommodation testing?
The lens flipper test
36
What is the normal expected result from the lens flipper test?
6 cycles in 30 seconds or less
37
Why is the near-far test not the gold standard?
Because most rooms are not long enough to completely facilitate relaxed accommodation
38
What is the normal expected result from the near-far test?
10 cycles in 30 seconds or less
39
What is the most common way to evaluate lag of accommodation?
Dynamic retinoscopy testing
40
What are the three tests for evaluating lag of accommodation?
Nott retinoscopy Monocular estimation method retinoscopy Bell retinoscopy
41
What is the expected normal finding for lag of accommodation?
+0.50 and symmetric
42
What do findings greater than +0.50D of lag indicate?
Lazy accommodative demand or high lag
43
What do findings of less than +0.50D of lag indicate?
Low, zero, or negative lag or a tight accommodative response
44
What do asymmetric lag findings indicate?
Refractive or healh etiology
45
How do you record positive lag of accommodation for Nott retinoscopy?
With motion is initially noticed, move back until neutral and measure dioptric distance with near point rod
46
How do you record "no" lag of accommodation for Nott retinoscopy?
Neurality is initially noticed inidicating that the accommodative response is equal to the accommodative demand
47
How do you record minus lag of accommodation for Nott retinoscopy?
Against motion is initially noticed, move forward until neutral, do not record magnitude because any minus lag needs to be remedied
48
What is the retinoscopic test of choice for behind the phoropter?
Nott retinoscopy
49
What is the retinoscopic test of schoice for outside of the phoropter?
MEM retinoscopy
50
What makes depth of focus greater?
Smaller pupil or larger object
51
How can the patient see the target clearly when the accommodative response does not equal the accommodative demand?
Depth of focus can make up for the lag of accommodation
52
What is the difference btween depth of focus and depth of field?
Fous is for the retina and field is for object space
53
What are the two methods for evaluating the sustaining ability of accommodation?
Amplitude of accommodation decay test and facility of accommodation decay test

Procedures (16 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions