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Related Concept Videos

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...
Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
Drugs such as carbonic anhydrase inhibitors, α2- and...
Angle Closure Glaucoma: Treatment01:28

Angle Closure Glaucoma: Treatment

Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
Cranial Nerves: Types Part I01:14

Cranial Nerves: Types Part I

Cranial nerves are responsible for transmitting motor and sensory information between the brain and various parts of the body. There are twelve pairs of cranial nerves, with the first six being essential in sensory perception, motor control, and autonomic functions related to the head and neck.
Olfactory Nerve (Cranial Nerve I)
The olfactory nerve, or cranial nerve I, is unique as it is purely sensory and dedicated to the sense of smell. This nerve originates in the olfactory epithelium of the...
Cranial Nerves: Overview and Anatomy01:19

Cranial Nerves: Overview and Anatomy

The cranial nerves are an important part of the complex network of nerves in the human body. These nerves emerge directly from the brain and are responsible for transmitting essential information between the brain and various parts of the head and neck. There are 12 pairs of cranial nerves, systematically numbered using Roman numerals from I to XII, beginning from the anterior and moving to the posterior of the brain. Each cranial nerve is uniquely identified by names that reflect its function...
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.

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Related Experiment Video

Updated: Jun 8, 2026

Using Optical Coherence Tomography and Optokinetic Response As Structural and Functional Visual System Readouts in Mice and Rats
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Using Optical Coherence Tomography and Optokinetic Response As Structural and Functional Visual System Readouts in Mice and Rats

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Neuro-ophthalmology: a review.

I G Joe Mayhew1

  • 1Massey University Aotearoa, New Zealand.

Equine Veterinary Journal. Supplement
|October 14, 2010
PubMed
Summary

A thorough neuroophthalmic examination is crucial for diagnosing eye problems and visual impairments in horses. This guide helps interpret findings to pinpoint lesions causing various neurological and ocular conditions.

Area of Science:

  • Veterinary Ophthalmology
  • Equine Neurology

Background:

  • Assessing visual acuity and ocular conditions in horses often necessitates a comprehensive neuroophthalmic examination.
  • Identifying the precise location of lesions is key to understanding various neurological and ophthalmic signs.

Purpose of the Study:

  • To provide a detailed guide for conducting thorough neuroophthalmic examinations in horses.
  • To assist in the correct interpretation of findings related to ocular and neurological disorders.

Main Methods:

  • Detailed description of the neuroophthalmic examination procedure for equine patients.
  • Guidance on correlating clinical signs with potential lesion localization.

Main Results:

  • The examination helps identify the site of lesions causing blindness, miosis, mydriasis, anisocoria, Horner's syndrome, strabismus, facial paralysis/spasm, nystagmus, and vestibular/cerebellar disorders.

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  • Provides a framework for understanding the neuroanatomical basis of observed clinical signs.
  • Conclusions:

    • A systematic neuroophthalmic examination is essential for accurate diagnosis of equine eye and neurological conditions.
    • Proper interpretation of findings aids in effective treatment and management strategies for affected horses.