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abducens nerve

Robert J. Barry and Alastair K. Denniston.

in A Dictionary of Ophthalmology

P ublished online March 2017 .

Reference Entry. Subjects: Ophthalmology. 19 words.

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

abduction

Robert J. Barry and Alastair K. Denniston.

in A Dictionary of Ophthalmology

P ublished online March 2017 .

Reference Entry. Subjects: Ophthalmology. 11 words.

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

abnormal retinal correspondence

Robert J. Barry and Alastair K. Denniston.

in A Dictionary of Ophthalmology

P ublished online March 2017 .

Reference Entry. Subjects: Ophthalmology. 42 words.

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

accommodation

Robert J. Barry and Alastair K. Denniston.

in A Dictionary of Ophthalmology

P ublished online March 2017 .

Reference Entry. Subjects: Ophthalmology. 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

Robert J. Barry and Alastair K. Denniston.

in A Dictionary of Ophthalmology

P ublished online March 2017 .

Reference Entry. Subjects: Ophthalmology. 26 words.

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

achromatopsia

Robert J. Barry and Alastair K. Denniston.

in A Dictionary of Ophthalmology

P ublished online March 2017 .

Reference Entry. Subjects: Ophthalmology. 24 words.

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

Achromatopsia-Rod Monochromacy

Susanne Kohl.

in Genetic Diseases of the Eye, Second Edition

January 2012; p ublished online October 2012 .

Chapter. Subjects: Clinical Genetics; Ophthalmology. 6142 words.

Achromatopsia is also referred to as rod monochromacy (or rod monochromatism), complete (or total) color blindness (OMIM 216900, 262300, and 139340) or day blindness (hemeralopia) and is...

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acuity

Robert J. Barry and Alastair K. Denniston.

in A Dictionary of Ophthalmology

P ublished online March 2017 .

Reference Entry. Subjects: Ophthalmology. 4 words.

acute angle closure glaucoma

Robert J. Barry and Alastair K. Denniston.

in A Dictionary of Ophthalmology

P ublished online March 2017 .

Reference Entry. Subjects: Ophthalmology. 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

Robert J. Barry and Alastair K. Denniston.

in A Dictionary of Ophthalmology

P ublished online March 2017 .

Reference Entry. Subjects: Ophthalmology. 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

Robert J. Barry and Alastair K. Denniston.

in A Dictionary of Ophthalmology

P ublished online March 2017 .

Reference Entry. Subjects: Ophthalmology. 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

Robert J. Barry and Alastair K. Denniston.

in A Dictionary of Ophthalmology

P ublished online March 2017 .

Reference Entry. Subjects: Ophthalmology. 52 words.

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

Adams [later Rawson], Sir William (1783–1827), oculist

W. P. Courtney.

in Oxford Dictionary of National Biography

September 2004; p ublished online September 2004 .

Reference Entry. Subjects: Ophthalmology. 844 words.

Adams [later Rawson], Sir William (1783–1827), oculist, was born at Stanbury, Morwenstow, Cornwall, on 5 December 1783, the youngest son of Henry Adams (d. 1811) and his wife, Demaris...

adaptive optics

Robert J. Barry and Alastair K. Denniston.

in A Dictionary of Ophthalmology

P ublished online March 2017 .

Reference Entry. Subjects: Ophthalmology. 41 words.

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

adduction

Robert J. Barry and Alastair K. Denniston.

in A Dictionary of Ophthalmology

P ublished online March 2017 .

Reference Entry. Subjects: Ophthalmology. 11 words.

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

Adie’s pupil

Robert J. Barry and Alastair K. Denniston.

in A Dictionary of Ophthalmology

P ublished online March 2017 .

Reference Entry. Subjects: Ophthalmology. 39 words.

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

adult vitelliform macular dystrophy

Robert J. Barry and Alastair K. Denniston.

in A Dictionary of Ophthalmology

P ublished online March 2017 .

Reference Entry. Subjects: Ophthalmology. 39 words.

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

Advanced diabetic eye disease

Karen Whitehouse.

in Diabetic Retinopathy

December 2008; p ublished online May 2011 .

Chapter. Subjects: Endocrinology and Diabetes; Ophthalmology. 1660 words.

Hypoxia of the retina leads to development of new vessels which subsequently may form fibrous and glial tissue.

Gliosis and...

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Advanced Upper Eyelid Sebaceous Gland Carcinoma with Deep Orbital Extension

Syed Ali Raza Rizvi and Veena Maheshwari.

in Journal of Surgical Case Reports

March 2010; p ublished online March 2010 .

Journal Article. Subjects: Ophthalmology. 906 words.

Sebaceous gland carcinomas (SGC) are highly malignant lid tumors which originate from meibomian glands and rarely from the gland of Zeis, sebaceous gland of caruncle, eyebrows and...

Go to »  abstract

age-related macular degeneration

Robert J. Barry and Alastair K. Denniston.

in A Dictionary of Ophthalmology

P ublished online March 2017 .

Reference Entry. Subjects: Ophthalmology. 69 words.

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