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Related Concept Videos

Vision01:24

Vision

Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
Glaucoma: Overview01:25

Glaucoma: Overview

Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
Association Areas of the Cortex01:21

Association Areas of the Cortex

Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
Visual System01:26

Visual System

Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
Visual Agnosia01:12

Visual Agnosia

Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round end"...
Anatomy of the Eyeball01:20

Anatomy of the Eyeball

The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle layer, the vascular tunic,...

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Updated: Jun 4, 2026

Dynamic Visual Tests to Identify and Quantify Visual Damage and Repair Following Demyelination in Optic Neuritis Patients
12:23

Dynamic Visual Tests to Identify and Quantify Visual Damage and Repair Following Demyelination in Optic Neuritis Patients

Published on: April 14, 2014

Visual fields in neuro-ophthalmology.

Sachin Kedar1, Deepta Ghate, James J Corbett

  • 1Department of Neurology, University of Kentucky College of Medicine, Lexington, KY, USA. drsachinkedar@gmail.com

Indian Journal of Ophthalmology
|February 26, 2011
PubMed
Summary
This summary is machine-generated.

Visual field testing is crucial for diagnosing and monitoring visual pathway lesions. It aids in managing conditions like idiopathic intracranial hypertension and toxic optic neuropathies, guiding treatment and rehabilitation.

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Area of Science:

  • Ophthalmology
  • Neuro-ophthalmology
  • Neurology

Background:

  • Visual field assessment is vital for evaluating visual pathway lesions.
  • It's essential for baseline and follow-up monitoring of neuro-ophthalmic conditions.
  • Standard automated perimetry is the preferred method for most practitioners.

Purpose of the Study:

  • To highlight the importance of visual field testing in clinical practice.
  • To discuss the utility of different visual field testing methods.
  • To emphasize the role of visual fields in managing various neurological and ophthalmological conditions.

Main Methods:

  • Standard automated perimetry (SAP) for routine practice.
  • Goldman kinetic visual fields for severe deficits and peripheral defects.
  • Review of clinical applications in neuro-ophthalmology.

Main Results:

  • Visual fields are essential for diagnosing and monitoring conditions like IIH, MS optic neuropathy, and pituitary adenomas.
  • Screening for toxic optic neuropathies (e.g., ethambutol, vigabatrin) is a key application.
  • Defects impact daily activities, necessitating consideration in rehabilitation planning.

Conclusions:

  • Visual field testing is indispensable for all patients with visual pathway lesions.
  • It guides treatment decisions and monitors disease progression or recurrence.
  • Appropriate testing methods should be selected based on patient deficits.