Brainscape's Knowledge GenomeTM

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


See full index

Clinical Refraction > Light and Refraction > Flashcards

Light and Refraction Flashcards

1
Q

Occurs when light passes from one medium to another of different refractive index

A

Refraction

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

Responsible for the majority of the refractive power of the eye

A

Cornea

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

What is the refractive power of the cornea

A

43-44D

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

A refractive component of the eye that has 20-23D refractive power

A

Crystalline lens

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

What is the total refractive power of the eye?

A

60-63D

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

This law states that light rays are focused on the retina because they are refracted by passing through the cornea and lens

A

Snell’s Law

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

Term for a normal eye

A

Emmetropia

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

Corneal refractive power is (constant, modifiable)

A

constant

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

Lens refractive power is (constant, modifiable)

A

modifiable

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

Axial length of the eye is (constant, modifiable) except under certain conditions

A

constant

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

A term when a refractive error is present

A

Ametropia

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

Nearsightedness

A

Myopia

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

Farsightedness

A

Hyperopia

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

Curvature of the cornea and/or lens is not spherical

A

Astigmatism

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

Term used when lens is not spherical

A

Toroidal

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

The loss of accommodative ability of the crystalline lens

A

Presbyopia

17
Q

Presbyopia is more _____ in nature since it comes with advanced age

A

physiologic

18
Q

Presbyopia is also called as?

A

Short-arm syndrome

19
Q

A refractive power difference of more than 2D between the two eyes

A

Anisometropia

20
Q

A difference of image size between the two eyes as perceived by the patient

A

Aniseikonia

21
Q

Absence of lens

22
Q

Phakos means?

23
Q

Artificial lens in the eye

A

Pseudophakia

24
Q

Lens with thin center and thick edges

A

Concave lenses

25
Q

Made up of two prisms aligned apex to apex

A

Concave lens

26
Q

Hallowed center

A

Concave lens

27
Q

Lenses with thick center and thin edges

A

Convex lens

28
Q

Bulging center

A

Convex lens

29
Q

Made up of two prisms aligned base to base

A

Convex lens

30
Q

Concave lenses create what type of images?

A

Virtual and erect

31
Q

Minifies images

A

Concave lens

32
Q

With movement

A

Concave lens

33
Q

Convex lenses create what type of images?

A

Real and inverted

34
Q

Magnifies images

A

Convex lens

35
Q

Against movement

A

Convex lens

Clinical Refraction (4 decks)

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