Brainscape's Knowledge GenomeTM

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


See full index

Rucker Test 1 > Visual System > Flashcards

Visual System Flashcards

1
Q

What is the cornea

A

A transparent protective tissue that is located at the front of the eye

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

What is the iris

A

Round colored part of the eye that regulates the size of the pupils thus regulating the amount of light that enters

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

What does the pupil do

A

Allow light into the eye

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

What do cone cells do

A

Identifies color, 1:1 ratio for cone to neuron cells, produces lodosin

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

What are rod cells

A

Identifies shapes and silhouettes, have a poor visual acuity and poor color response though, 10:1 ratio to neuron cells

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

What is the fovea centralis

A

Contains only cone cells and provides day vision, allows for sharp 20/20 vision

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

What is considered a blind spot

A

Where the optic nerve sits there are no rods or cones there

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

What degrees is the day blind spot

A

5.5-7.5 degrees

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

What degrees is the night blind spot

A

5-10°

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

What component of the eye contains rods and cones

A

Retina

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

*What chemical lets you see black white and gray

A

Rhodopsin

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

*What is the function of the pupil when looking at an object

A

Pupil allows light to enter the eye and stimulate the retina

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

What is an astigmatism

A

Due to unequal curvature if the cornea you can not focus on vertical and horizontal features at the same time

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

Glare disability

A

Inability to detect objects against varying shards or backgrounds related to contrast

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

People with myopia

A

Have near sighted ness

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

Hyperopia

A

Farsightedness

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

What is presbyopia

A

Hardening of lens, loss of elasticity and cataracts

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

What are the types of corneal surgical procedures

A

LASIK PRK and LASEK

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

What surgical procedure is less likely to cause damage due to the thinness of the flap

A

LASEK

20
Q

What is the condition result of blinded focal point behind renal plan or wall causing blurred vision (near objects are not seen well)

A

Hyperopia farsightedness

21
Q

What is it called when lens becomes less elastic over time

A

Presbyopia

22
Q

What are the three types of vision

A

Photopic, mesopic, scotopic

23
Q

What is photopic vision

A

Daylight, central vision, color Spence and image is sharp, 20/20 vision

24
Q

Mesopic vision

A

Transition day to night, dawn dusk moon light, use of parafoveal region (rods and cones), decreased visual acuity and color sense

25
Q

What should you do during Mesopic vision

A

Use increased scanning, no hoist

26
Q

What is scotopic vision

A

Night vision, peripheral vision (rods only), acutely degraded to silhouette recognition, loss of color perception, off center view technique

27
Q

What type of vision is the most dangerous

A

Mesopic vision

28
Q

Typed of monocular cues (GRAM)

A

Geometric, Retinal, Aerial, Motion

29
Q

What monocular cue is most important for depth perception

A

Motion parallax

30
Q

What is geometric perspective

A

Objects have different shapes when viewed at different angles Farther you are from an object the less detail there is compared to if you were closer

31
Q

Geometric Perspective - LAV

A
  • Linear perspective
  • Apparent Foreshortening
  • Vertical Position in the field
32
Q

Retinal Image Size - KITO

A
  • Known Size
  • Increasing/decreasing size
  • Terrestrial association
  • Overlapping contours
33
Q

How can you use terrestrial association

A

Compare one object to another object that you know the size off can help one estimate the size of the object you don’t know that size of

34
Q

Aerial Perspective - FLP

A
  • Fading
  • Loss of detail
  • Position of light source
35
Q

What are the two aspects of motion parallax

A

Stationary objects and observing moving Rate depends on relative distance of the object from the observer

36
Q

What are some limitations for night vision

A

Loss of depth perception, loss of visual acuity, night blind spots, dark adaption, color perception, night myopia, visual cues

37
Q

What is dark adaptation time

A

30-45 min time it takes for eyes to adjust from rods to cones

38
Q

Two most important monocular factors

A

Motion parallax Retinal image size

39
Q

At night what is the best visual city you can get

A

20/200

40
Q

With NGV at night what’s the best you can see

A

20/40

41
Q

What vitamin helps with production of rhodopsin

A

A

42
Q

What is night myopia

A

Blue wavelength pervades in visible position causes this

43
Q

What are four examples of flight hazards

A
  • Solar flare
  • Birds
  • Lasers
  • Nerve agents
44
Q

What are active ways to protect against lasers

A

Counter measures, evasive action scanning with one eye

45
Q

What are some passive ways to protect against lasers

A

Take cover, squint, goggles

Rucker Test 1 (11 decks)

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