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ABO - Refractive Errors

front 1

Amblyopia

back 1

Loss of vision without any apparent disease of the eye.

front 2

Anisometropia

back 2

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

front 3

Antimetropia

back 3

A sub‐classification of anisometropia, is a rare refractive condition in which one eye is myopic and the fellow eye is hyperopic

front 4

Diplopia

back 4

The seeing of one object as two, due to uneven tracking of the eyes. Commonly known as double vision.

front 5

Presbyopia

back 5

Gradual lessening of the power of accommodation due to a physiologic change that becomes noticeable about the age of 35.

front 6

Emmetropia

back 6

When an eye is emmetropic, light rays coming into the eye from a distance come to perfect focus on the retina. When a person has emmetropia in both eyes, the person is described as having ideal vision.

front 7

Aniseikonia

back 7

A condition in which the image of an object as seen by one eye differs so much
in size or shape from that seen by the other eye that the two images cannot be
fused into a single impression.

front 8

Chromatic Abberation

back 8

Distortion of an optical image produced by the dispersion of light passing through a lens and generally characterized by blurred, multicolored edges.

front 9

Phoria

back 9

A tendency for the eye to deviate from its visual axis or the normal.

front 10

Esophoria

back 10

A tendency for one eye to deviate off the visual axis toward the other eye.

front 11

Exophoria

back 11

A tendency for one eye to deviate off the visual axis away from the other eye.

front 12

Tropia

back 12

An obvious actual deviation from normal of the axis of the eyes.

front 13

Esotropia

back 13

Actual deviation of one eye toward the visual axis of the other eye (crossed eyes).

front 14

Exotropia

back 14

Actual deviation of one eye away from the visual axis of the other eye (wall eyed).

front 15

Simple Hyperopic Astigmatism

back 15

The refractive condition where one point of focus falls on the retina and the other point of focus falls behind the retina.

Example: plano +1.50 x 180.

front 16

Simple Myopic Astigmatism

back 16

The refractive condition where one point of focus falls on the retina and the other point of focus falls in front of the retina.

Example: plano -2.00 x 180

front 17

Compound Hyperopic Astigmatism

back 17

The refractive error which results in two points of focus falling behind the retina.

Example: +1.00 +2.00 x 090

front 18

Compound Myopic Astigmatism

back 18

The refractive error which results in two points of focus falling in front of the retina.

Example: -1.00 -2.00 x 090

front 19

Mixed Astigmatism

back 19

The refractive condition in which light comes to two points of focus where one point is in front of the retina, and the other is behind the retina.

Example: +1.00 -2.00 x 180

front 20

Bifocal are used to correct for a condition called:

back 20

Presbyopia

front 21

An RX with the O.D. minus and the O.S. plus is an obvious case of:

back 21

Antimetropia

front 22

RX O.D. -4.50 -1.00 x 180, O.S. -2.50 -1.00 x 45, This prescription indicates an obvious case of:

back 22

Anisometropia

front 23

A patient with a hyperopic prescription always has the following kind of power:

back 23

Plus power

front 24

An ophthalmic correction for a patient with amblyopia is to focus parallel incident light rays at the:

back 24

Far point of the eye

front 25

A patient with a myopic prescription always the following kind of power:

back 25

Minus power

front 26

The condition of vision due to diminished accommodative amplitude which moves the near point further from the eye than is convenient for reading is known as:

back 26

Presbyopia

front 27

Trifocals are most generally prescribed when the patient has:

back 27

advanced presbyopia

front 28

Who is the best potential candidate for progressive power lenses?

back 28

A patient with early presbyopia