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Primary Eye and Vision Care > Anisometropia and Aniseikonia > Flashcards

Anisometropia and Aniseikonia Flashcards

1
Q

It is a binocular condition, that the image in one
eye is perceived as different in size compared to
the image in the other eye.

A

Aniseikonia

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2
Q

Discussed the possibility (1903)

A

C. Hess

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3
Q

Designed iseikonic lenses for aniseikonia

A

Von Rohr

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4
Q

Commented upon the probability of unequal

image sizes. (1864)

A

Donders

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5
Q

Lenses which correct aniseikonia and include also

the correction of refractive error.

A

Iseikonic Lenses

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6
Q

Condition in which the size and shape of the

ocular images are equal

A

Iseikonia

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7
Q

Condition in which ocular images are unequal in

size and shape

A

Aniseikonia

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8
Q

Type of Aniseikonia that the eyes are gazing in a certain direction

A

Static Aniseikonia

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9
Q

Type of Aniseikonia that the eyes have to rotate a different amount to gaze at the same point in space
or it is anisophoria (optically induced)

A

Dynamic Aniseikonia

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10
Q

the size of one ocular image is

symmetrically larger that the other.

A

Symmetrical Overall

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11
Q 
the size of one ocular image is
symmetrically larger that the other in one
meridian only
Axis 90
Axis 180
Axis oblique
A

Symmetrical Meridional

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12
Q

combination of overall and

meridional is manifested.

A

Symmetrical Compound

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13
Q

image distortion increases

progressively in both directions

A

Asymmetrical Pincushion

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14
Q

image distortion decreases progressively

in both directions

A

Asymmetrical Barrel

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15
Q

image difference increases

progressively in one direction

A

Asymmetrical Prismatic

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16
Q

image size remains the same but there

occurs an oblique distortion of shape.

A

Asymmetrical Oblique

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17
Q

Variation in size differ from different positions of

the visual field

A

Asymmetrical

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18
Q

asymmetric convergence and stereoscopic disparities exists as when viewing the object located to one side.

A

Normal

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19
Q

i. Pincushion or Barrel

ii. Ever increasing magnification towards the apex of a prism.

A

Abnormal Asymmetric

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20
Q

i. Overall
ii. Meridional
iii. Compound

A

Abnormal Symmetric

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21
Q

Testing of Aniseikonia based on binocular space perception

A

Space Eiknometric Method

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22
Q

Testing of Aniseikonia based on directly comparing perceived image sizes between the two eyes

A

Direct Comparison Method

23
Q

instrument for measuring aniseikonia.

A

Space Eikonometer

24
Q

3 commercially available direct comparison

tests

A
  1. New Aniseikonia Test (Awaya Test)
  2. Basic Aniseikonia Test (version 1)
  3. Aniseikonia Inspector (version 3)
25
Q

provides a manual method to detect and calibrate the Aniseikonic condition.

A

New Aniseikonia Test (Awaya Test)

26
Q

is an easy-to-use Windows software program to

test the aniseikonia of a patient.

A

Basic Aniseikonia Test (Version 1)

27
Q

is a Windows software program for the clinical

management of aniseikonia.

A

Aniseikonia Inspector (Version 3)

28
Q

Give atleast 3 symptoms of Aniseikonia

A 
Headache
asthenopia
Photophobia
Reading Difficulty
Nausea
Nervousness
29
Q

Give atleast 4 optical correction/solution

A

Contact lens
Glasses Good VA
Glasses Compromised
Contact Glasses-Combination

30
Q

a condition in which the refractive status of one eye differs from that the other.

A

Anisometropia

31
Q

The condition in which the

refractive status is equal in the two eyes.

A

Isometropia

32
Q

A form of anisometropia in which one eye is myopic and the otherhyperopic.

A

Antimetropia

33
Q

Anisometropia or

A

Asymmetropia

34
Q

Anisometropia is generally classified into three, what are those

A

By Type
By Degree
By Etiology

35
Q

A type of Anisometropia that has different amount of the same error of refraction.

A

Anisometropia

36
Q

A type of Anisometropia that has different type of errors

such as hyperopia vs. myopia or spherical vs. astigmatic.

A

Antimetropia

37
Q

A degree of Anisometropia that its differences in error totalling no more than 2.00 D.

A

Low

38
Q

An etiology of anisometropia that occurs
because of differential growth of the eyeball
of both eyes. It is hereditary in origin.

A

Congenital Anisometropia

39
Q

An etiology of anisometropia that is created by
trauma, pathology or the results of systemic
changes.

A

Acquired Anisometropia

40
Q

A classification of anisometropia that is a condition in
which the refractive power of the two eyes is
unequal.

A

Absolute Anisometropia

41
Q

A classification of anisometropia that is that type of
refractive anomaly in which although the total
refraction of the two eyes is equal, the component
elements in each show relatively large
differences.

A

Relative Anisometropia

42
Q

Type of absolute anisometropia that is one eye is normal and the other is either hypermetropic or myopic.

A

Simple

43
Q

Type of absolute anisometropia that is both eyes are ametropic either hyperopic or myopic, but one eye has a higher refractive error.

A

Compound

44
Q

Type of absolute anisometropia that both eyes are ametropic. One eye is hyperopic and the other is myopic. This is called antimetropia.

A

Mixed

45
Q

Type of absolute anisometropia when one
eye is normal and the other has either myopic
or hyperopic astigmatism.

A

Simple Astigmatic Anisometropia

46
Q

Type of absolute anisometropia when both eyes are astigmatic but of unequal degree.

A

Compound Astigmatic Anisometropia

47
Q

If there is a difference of more than 5D between the two eyes, the patient loses binocularity.

A

Binocular Vision

48
Q

If the anisometropia is high and the eyes have a

good visual acuity,

A

Alternating Vision

49
Q

If the defect in one eye is high and if its visual

acuity is not good,

A

Amblyopia

50
Q

A concomitant convergent squint occurs in
children with the eye having the defect
becoming convergent.

A

Strabismus

51
Q

Tue or False Anisometropia is not a serious concern

in newborns and young children

A

False

52
Q

Give atlest 3 symptoms of anisometropia

A 
Amblyopia
Strabismus
Diplopia
Eye Strain
Headaches
Sheer Tiredness
53
Q

Tests for Anisometropia

A

Worth 4 light/dot Test
LEA Vision Test System (amblyopia)
Screening Test

54
Q

Optical Management for Anisometropia

A

Spectacles

Contact Lenses

Primary Eye and Vision Care (3 decks)

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