Related Experiment Video
Updated: Feb 5, 2026
08:04
Measuring Sensitivity to Viewpoint Change with and without Stereoscopic Cues
Published on: December 4, 2013
4.8K
Stereoscopic Vision in Macular Telangiectasia Type 2
Simone Müller1, Tjebo F C Heeren2,3, Jennifer Nadal4
1Department of Ophthalmology, University of Bonn, Bonn, Germany, simone.mueller@ukbonn.de.
Summary
Stereoscopic vision is significantly impaired in patients with Macular Telangiectasia (MacTel) type 2, even with mild vision loss. Paracentral sensitivity deficits strongly correlate with reduced stereoscopic function.
Area of Science:
- Ophthalmology
- Neuroscience
- Vision Science
Background:
- Macular Telangiectasia (MacTel) type 2 is a degenerative retinal disease.
- Early detection of visual dysfunction is crucial for managing MacTel type 2.
Purpose of the Study:
- To investigate stereoscopic vision in MacTel type 2 patients.
- To correlate paracentral visual sensitivity loss with impaired stereoscopic function.
Main Methods:
- Prospective study of 50 MacTel type 2 patients and 25 controls.
- Stereoscopic function assessed using Lang I, Titmus, and TNO tests.
- Central visual sensitivity evaluated via microperimetry; scotomata quantified.
Main Results:
- MacTel type 2 patients showed significantly reduced stereoscopic vision compared to controls (p < 0.0001).
- Impairment occurred even with relative or monocular paracentral scotoma.
- Reduced stereopsis strongly correlated with horizontal scotoma size and distance from the fovea.
Conclusions:
- Stereoscopic vision is impaired early in MacTel type 2.
- Paracentral sensitivity loss significantly impacts stereoscopic function, irrespective of visual acuity.
- The location of paracentral scotomata is critical for understanding stereoscopic deficits.
More Related Videos
09:29A Standardized Obstacle Course for Assessment of Visual Function in Ultra Low Vision and Artificial Vision
Published on: February 11, 2014
13.5K
10:24Regenerative Therapy by Suprachoroidal Cell Autograft in Dry Age-related Macular Degeneration: Preliminary In Vivo Report
Published on: February 12, 2018
10.8K
Related Concept Videos
01:24Vision
60.1K
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.
60.1K
01:22Diabetes Mellitus: Type 2 and Gestational
5.0K
Type 2 diabetes, characterized by insulin resistance, arises when the insulin receptors on cells lose responsiveness to insulin, diminishing the cell's capacity to take up glucose, resulting in elevated blood glucose levels. To receive a diagnosis of Type 2 diabetes, a series of blood glucose tests are necessary to assess whether the blood glucose falls within normal parameters. If the result is out of the normal range, a patient may be diagnosed as prediabetic or diabetic, depending on the...
5.0K
01:24Color Vision
1.5K
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.
1.5K
01:15Depth Perception and Spatial Vision
2.0K
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.
2.0K
01:13meta-Directing Deactivators: –NO2, –CN, –CHO, –CO2R, –COR, –CO2H
6.7K
All meta-directing substituents are deactivating groups. These substituents withdraw electrons from the aromatic ring, making the ring less reactive toward electrophilic substitution. For example, the nitration of nitrobenzene is 100,000 times slower than that of benzene because of the deactivating effect of the nitro group. The first step in an electrophilic aromatic substitution is the addition of an electrophile to form a resonance-stabilized carbocation. The energy diagrams for...
6.7K
01:23Types of RNA
72.9K
Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
72.9K