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abducens nerve

abducens nerve   Quick reference

A Dictionary of Ophthalmology

Reference type:
Subject Reference
Current Version:
2017
Subject:
Medicine and health, Clinical Medicine, Surgery
Length:
19 words

The sixth cranial nerve. It innervates the ipsilateral lateral rectus muscle, resulting in *abduction of the eye.

abduction

abduction   Quick reference

A Dictionary of Ophthalmology

Reference type:
Subject Reference
Current Version:
2017
Subject:
Medicine and health, Clinical Medicine, Surgery
Length:
11 words

Horizontal movement of the eye outwards (away from the nose).

abnormal retinal correspondence

abnormal retinal correspondence   Quick reference

A Dictionary of Ophthalmology

Reference type:
Subject Reference
Current Version:
2017
Subject:
Medicine and health, Clinical Medicine, Surgery
Length:
42 words

A cortical mechanism to remap anatomically non-corresponding points of each retina to stimulate functionally corresponding points in the *occipital

accommodation

accommodation   Quick reference

A Dictionary of Ophthalmology

Reference type:
Subject Reference
Current Version:
2017
Subject:
Medicine and health, Clinical Medicine, Surgery
Length:
24 words

The process by which the eye changes focus from distant to near objects through conformational changes in the ciliary muscle

accommodative convergence : accommodation (AC : A) ratio

accommodative convergence : accommodation (AC : A) ratio   Quick reference

A Dictionary of Ophthalmology

Reference type:
Subject Reference
Current Version:
2017
Subject:
Medicine and health, Clinical Medicine, Surgery
Length:
26 words

The measure of accommodative convergence per unit of accommodation. Convergence and accommodation are related neurologically, but the AC : A ratio varies

achromatopsia

achromatopsia   Quick reference

A Dictionary of Ophthalmology

Reference type:
Subject Reference
Current Version:
2017
Subject:
Medicine and health, Clinical Medicine, Surgery
Length:
24 words

An inherited disorder of *cone photoreceptor function in which all three subtypes are lacking or non-functional. Incomplete and complete

acute angle closure glaucoma

acute angle closure glaucoma   Quick reference

A Dictionary of Ophthalmology

Reference type:
Subject Reference
Current Version:
2017
Subject:
Medicine and health, Clinical Medicine, Surgery
Length:
30 words

A condition in which there is *acute primary angle closure (APAC) leading to sufficiently sustained *intraocular pressure to

acute posterior multifocal placoid pigment epitheliopathy

acute posterior multifocal placoid pigment epitheliopathy   Quick reference

A Dictionary of Ophthalmology

Reference type:
Subject Reference
Current Version:
2017
Subject:
Medicine and health, Clinical Medicine, Surgery
Length:
63 words

A rare condition characterized by bilateral cream-coloured placoid lesions of the posterior fundus. The lesions arise at the level of

acute primary angle closure

acute primary angle closure   Quick reference

A Dictionary of Ophthalmology

Reference type:
Subject Reference
Current Version:
2017
Subject:
Medicine and health, Clinical Medicine, Surgery
Length:
140 words

A condition characterized by acute presentation with severe ocular pain, redness, and a fixed semidilated pupil associated with a very

acute retinal necrosis

acute retinal necrosis   Quick reference

A Dictionary of Ophthalmology

Reference type:
Subject Reference
Current Version:
2017
Subject:
Medicine and health, Clinical Medicine, Surgery
Length:
52 words

A rare syndrome of necrotizing retinitis caused by varicella zoster virus or herpes simplex virus (type 1 or 2). In

adaptive optics

adaptive optics   Quick reference

A Dictionary of Ophthalmology

Reference type:
Subject Reference
Current Version:
2017
Subject:
Medicine and health, Clinical Medicine, Surgery
Length:
41 words

An imaging technique which utilizes real-time measurement of optical aberrations via a wavefront sensor and subsequent compensation by highly deformable

adduction

adduction   Quick reference

A Dictionary of Ophthalmology

Reference type:
Subject Reference
Current Version:
2017
Subject:
Medicine and health, Clinical Medicine, Surgery
Length:
11 words

Horizontal movement of the eye inwards (i.e. towards the nose).

Adie’s pupil

Adie’s pupil   Quick reference

A Dictionary of Ophthalmology

Reference type:
Subject Reference
Current Version:
2017
Subject:
Medicine and health, Clinical Medicine, Surgery
Length:
39 words

A pupil with abnormal parasympathetic innervation, which typically results in *mydriasis, poor constriction to light, and exaggerated but

adult vitelliform macular dystrophy

adult vitelliform macular dystrophy   Quick reference

A Dictionary of Ophthalmology

Reference type:
Subject Reference
Current Version:
2017
Subject:
Medicine and health, Clinical Medicine, Surgery
Length:
39 words

An uncommon macular condition arising in adulthood, characterized by bilateral round yellow symmetrical subretinal lesions at the fovea. It has

age-related macular degeneration

age-related macular degeneration   Quick reference

A Dictionary of Ophthalmology

Reference type:
Subject Reference
Current Version:
2017
Subject:
Medicine and health, Clinical Medicine, Surgery
Length:
69 words

A very common blinding condition of the older population arising primarily from changes in the *photoreceptor and RPE layers

agonist

agonist   Quick reference

A Dictionary of Ophthalmology

Reference type:
Subject Reference
Current Version:
2017
Subject:
Medicine and health, Clinical Medicine, Surgery
Length:
28 words

A term describing extraocular muscles; the primary extraocular muscle that moves an eye in a particular direction, and in the

albinism

albinism   Quick reference

A Dictionary of Ophthalmology

Reference type:
Subject Reference
Current Version:
2017
Subject:
Medicine and health, Clinical Medicine, Surgery
Length:
20 words

Abnormalities in the synthesis of melanin affecting the eye alone (ocular albinism) or eye, skin, and hair (oculocutaneous albinism).

alphabet patterns

alphabet patterns   Quick reference

A Dictionary of Ophthalmology

Reference type:
Subject Reference
Current Version:
2017
Subject:
Medicine and health, Clinical Medicine, Surgery
Length:
62 words

Forms of *strabismus in which horizontal deviations vary in size according to vertical direction of gaze. They are so

amblyopia

amblyopia   Quick reference

A Dictionary of Ophthalmology

Reference type:
Subject Reference
Current Version:
2017
Subject:
Medicine and health, Clinical Medicine, Surgery
Length:
78 words

A common developmental defect of central visual processing leading to reduced vision in one or both eyes, occurring secondary to

ametropia

ametropia   Quick reference

A Dictionary of Ophthalmology

Reference type:
Subject Reference
Current Version:
2017
Subject:
Medicine and health, Clinical Medicine, Surgery
Length:
53 words

The presence of *refractive error, resulting in the failure of the eye to focus light from an object

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