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Related Concept Videos

Vision01:24

Vision

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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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Color Vision01:24

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Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
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Depth Perception and Spatial Vision01:15

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Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
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Fixing Double-strand Breaks02:04

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The double-stranded structure of DNA has two major advantages. First, it serves as a safe repository of genetic information where one strand serves as the back-up in case the other strand is damaged. Second, the double-helical structure can be wrapped around proteins called histones to form nucleosomes, which can then be tightly wound to form chromosomes. This way, DNA chains up to 2 inches long can be contained within microscopic structures in a cell. A double-stranded break not only damages...
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Adult Stem Cells01:33

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Stem cells are undifferentiated cells that divide and produce more stem cells or progenitor cells that differentiate into mature, specialized cell types. All the cells in the body are generated from stem cells in the early embryo, but small populations of stem cells are also present in many adult tissues including the bone marrow, brain, skin, and gut. These adult stem cells typically produce the various cell types found in that tissue—to replace cells that are damaged or to continuously...
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A Standardized Obstacle Course for Assessment of Visual Function in Ultra Low Vision and Artificial Vision
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Double vision in adults.

Travis Peck1, David Goldberg1,2

  • 1a Department of Medicine , Tower Health System , Reading , Pennsylvania.

Journal of Binocular Vision and Ocular Motility
|September 11, 2018
PubMed
Summary
This summary is machine-generated.

Adults experiencing double vision often have specific strabismus types, with small-angle hypertropia being most common. While often idiopathic, diplopia can signal serious conditions requiring thorough evaluation.

Keywords:
ETStrabismusXTdiplopianon-strabismic diplopiaprismsstrabismus surgery

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Area of Science:

  • Ophthalmology
  • Neuro-ophthalmology
  • Strabismus Research

Background:

  • Double vision (diplopia) in adults can stem from various causes.
  • Understanding patient demographics and etiological patterns is crucial for diagnosis.

Purpose of the Study:

  • To characterize adult patients presenting with double vision.
  • To identify common etiologies and presentation patterns of diplopia in an outpatient setting.

Main Methods:

  • Retrospective review of 125 adult patients presenting with double vision.
  • Comprehensive eye examinations including alignment, sensory testing, and neuro-ophthalmologic assessment.

Main Results:

  • Small-angle hypertropia (HT) was the most frequent strabismus type (21%).
  • Esotropia (ET) (20%), exotropia (XT) (14%), and various palsies (12% and 8%) were also common.
  • Idiopathic strabismus was prevalent, particularly in older adults.

Conclusions:

  • Adult diplopia can be categorized by strabismus type, age, and features.
  • While often idiopathic, diplopia warrants thorough investigation for underlying pathologies.