Related Experiment Video
Updated: Mar 29, 2026
07:45
Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition
Published on: July 21, 2020
5.1K
Photopsia and a temporal visual field defect
Marcela Marsiglia1, Jeffery G Odel1, Danielle S Rudich2
1Department of Ophthalmology, Columbia University, New York, New York, USA.
Survey of Ophthalmology
|November 26, 2015
Summary
A young woman experienced visual disturbances due to optic nerve hypoplasia and vitreous traction. Early detection and imaging are crucial for diagnosing this rare condition.
Area of Science:
- Ophthalmology
- Neuro-ophthalmology
Background:
- Optic nerve hypoplasia is a congenital condition affecting visual development.
- Peripapillary vitreous traction can influence optic nerve head morphology and function.
Observation:
- A 30-year-old woman presented with photopsia and a specific visual field defect in her left eye.
- Standard ophthalmic examinations were normal, but advanced imaging revealed key abnormalities.
- Swept-source OCT showed a thinned nasal nerve fiber layer and peripapillary vitreous traction.
Findings:
- The patient was diagnosed with optic nerve hypoplasia and associated peripapillary vitreous traction.
- Visual field testing confirmed a dense, sector-shaped defect originating from the blind spot.
- Despite normal macular OCT and ERGs, optic nerve head findings were significant.
Implications:
- This case highlights the importance of advanced imaging in diagnosing subtle optic nerve abnormalities.
- Understanding the interplay between optic nerve hypoplasia and vitreous traction is vital for patient management.
- Early identification can guide monitoring and potential interventions for visual field defects.
Keywords:
flu-like symptomshypoplasia of the optic nervenasal hypoplasia of the optic nervenerve fiber layerphotopsiaswept-source OCTtemporal visual field defectvisual fieldvisual field defectMore Related Videos
Related Concept Videos
01:22Photoreceptors and Visual Pathways
11.0K
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
11.0K
01:12Visual Agnosia
1.7K
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...
1.7K
01:20Anatomy of the Eyeball
11.7K
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...
11.7K
01:24Color Vision
1.9K
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.
1.9K
01:24Prosopagnosia
1.1K
Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...
1.1K