Anisometropia and Aniseikonia

Question 1

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

Answer 1

Anisometropia

Question 2

The condition in which the refractive status is equal in the two eyes.

Answer 2

Isometropia

Question 3

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

Answer 3

Antimetropia

Question 4

Different amount of the same error of refraction.

Answer 4

Anisometropia

Question 5

Different type of errors such as hyperopia vs. myopia or spherical vs. astigmatic.

Answer 5

Antimetropia

Question 6

This occurs because of differential growth of the eyeball of both eyes. It is hereditary in origin.

Answer 6

Congenital Anisometropia

Question 7

Created by trauma, pathology or the results of systemic changes.

Answer 7

Acquired Anisometropia

Question 8

It is a condition in which the refractive power of the two eyes is unequal.

Answer 8

Absolute anisometropia

Question 9

It 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. In other words, the total refraction of the two eyes can be equal, but the axial length may be different.

Answer 9

Relative anisometropia

Question 10

In this, one eye is normal and the other is either hypermetropic or myopic.

Answer 10

Simple

Question 11

In this, both eyes are ametropic either hyperopic or myopic, but one eye has a higher refractive error.

Answer 11

Compound

Question 12

In this both eyes are ametropic. One eye is hyperopic and the other is myopic. This is called antimetropia.

Answer 12

Mixed

Question 13

When one eye is normal and the other has either myopic or hyperopic astigmatism.

Answer 13

Simple Astigmatic Anisometropia

Question 14

When both eyes are astigmatic but of unequal degree.

Answer 14

Compound Astigmatic Anisometropia

Question 15

In small degrees of anisometropia , ____________ occurs. If there is a difference of more than 5D between the two eyes, the patient loses binocularity.

Answer 15

Binocular Vision

Question 16

If the anisometropia is high and the eyes have a good visual acuity, the patient gets into the habit of using the hypermetropic eye for distance and the myopic eye for near vision.

Answer 16

Alternating Vision

Question 17

If the defect in one eye is high and if its visual acuity is not good, the eye can be excluded altogether from vision and the eye becomes amblyopic.

Answer 17

Amblyopia

Question 18

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

Answer 18

Strabismus

Question 19

This is commonly referred to as lazy eye. This is when a child has reduced vision in one of their eyes because during childhood they have not used that eye adequately.

Answer 19

Amblyopia

Question 20

This is when a person is not able to align both of their eyes under normal conditions simultaneously and is referred as being cross eyed.

Answer 20

Strabismus

Question 21

This is when a person has double vision

Answer 21

Diplopia

Question 22

A clinical test mainly used for assessing a patient’s degree of “binocular vision” and “binocular single vision”.

Answer 22

Worth Four Light Test

Question 23

Test for suppression

Answer 23

Worth-4-dot test

Question 24

Tests for amblyopia

Answer 24

LEA Vision Test System

Question 25

A red reflex is when light is transmitted through the transparent portions of the eye and reflects off the retina, creating a reddish orange reflection in the eyes. Because ____________ technology, called photo screening, creates a digital red reflex image of the eye, anisometropia would normally be detected.

Answer 25

iScreen Vision

Question 26

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

Answer 26

Aniseikonia

Question 27

Greek: “unequal images”

Answer 27

Aniseikonia

Question 28

Commented upon the probability of unequal image sizes. (1864)

Answer 28

Donders

Question 29

Discussed the possibility (1903)

Answer 29

C.Hess

Question 30

Designed iseikonic lenses for aniseikonia

Answer 30

Von Rohr

Question 31

Condition in which the size and shape of the ocular images are equal

Answer 31

Iseikonia

Question 32

Condition in which ocular images are unequal in size and shape

Answer 32

Aniseikonia

Question 33

Lenses which correct aniseikonia and include also the correction of refractive error.

Answer 33

Iseikonic Lenses

Question 34

- eyes are gazing in a certain direction | - images are different in size

Answer 34

Static Aniseikonia

Question 35

-(optically induced) anisophoria -eyes have to rotate a different amount to gaze at the same point in space

Answer 35

Dynamic Aniseikonia

Question 36

The size of one ocular image is symmetrically larger that the other.

Answer 36

Overall Symmetrical

Question 37

The size of one ocular image is symmetrically larger that the other in one meridian only

Answer 37

Meridional Symmetrical

Question 38

Combination of overall and meridional is manifested.

Answer 38

Compound Symmetrical

Question 39

Variation in size differ from different positions of | the visual field

Answer 39

Asymmetrical

Question 40

Image distortion increases progressively in both directions

Answer 40

Pincushion

Question 41

Image distortion decreases progressively in both directions

Answer 41

Barrel

Question 42

Image difference increases progressively in one direction

Answer 42

Prismatic

Question 43

Image size remains the same but there occurs an oblique distortion of shape.

Answer 43

Oblique

Question 44

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

Answer 44

Normal

Question 45

- Pincushion or Barrel | - Ever increasing magnification towards the apex of a prism.

Answer 45

Abnormal Asymmetric

Question 46

- Overall - Meridional - Compound

Answer 46

Abnormal Symmetric

Question 47

Based on binocular space perception

Answer 47

SPACE EIKONOMETRIC METHOD

Question 48

Based on directly comparing perceived image sizes between the two eyes

Answer 48

DIRECT COMPARISON METHOD

Question 49

Instrument for measuring aniseikonia.

Answer 49

Space Eikonometer

Question 50

The space eikonometer is based on a | modification of _________.

Answer 50

Stereopsis

Question 51

The Awaya test for Aniseikonia provides a manual method to detect and calibrate the Aniseikonic condition.

Answer 51

New Aniseikonia Test

Question 52

_________ separates the right and left eye | images for comparison.

Answer 52

Red/Green

Question 53

- the _______________ is an easy-to-use Windows software program to test the aniseikonia of a patient. - use of red-green glasses

Answer 53

Basic Aniseikonia Test (version 1)

Question 54

A Windows software program for the clinical management of aniseikonia. It contains: - an advanced aniseikonic test - a design tool to calculate corecting prescriptions (aniseikonia and anisophoria corrections)

Answer 54

Aniseikonia Inspector (version 3)