Related Experiment Video
Updated: Jan 25, 2026

08:22
Application of Optical Coherence Tomography to a Mouse Model of Retinopathy
Published on: January 12, 2022
5.2K
Eagle Retinopathy: Bilateral, Symmetric Pitched-Dihedral Pattern Retinopathy
David Swanson1, Scott A Limstrom1, Don Wilson1
1Alaska Retinal Consultants, Anchorage, Alaska.
Ophthalmology. Retina
|May 4, 2019
Summary
An unusual retinal pattern, resembling tilted flying eagles, was identified in a case report. This asymptomatic finding, observed via widefield imaging, did not progress over two years.
Area of Science:
- Ophthalmology
- Retinal Imaging
- Medical Genetics
Background:
- Retinal imaging techniques have advanced, enabling detection of subtle findings.
- Longitudinal studies are crucial for understanding disease progression and identifying novel phenotypes.
Observation:
- A unique, symmetric, asymptomatic retinal pattern was observed.
- This pattern, described as resembling tilted flying eagles, was not visible on older retinal photographs.
Findings:
- Widefield, non-mydriatic autofluorescence imaging revealed the novel retinal findings.
- The observed pattern showed no progression over a two-year follow-up period.
- Comparison with baseline retinal images from 28 years prior confirmed the late-onset or previously undetected nature of the finding.
Implications:
- Widefield imaging may uncover previously unrecognized retinal conditions.
- This case highlights the potential for identifying new retinal phenotypes with advanced imaging.
- Further research is warranted to determine the etiology and clinical significance of this unique retinopathy.
Related Concept Videos
Symmetric Member in Bending
574
In the study of the mechanics of materials, analyzing the behavior of prismatic members under opposing couples is crucial for understanding internal stress distributions, which are essential for structural design. When subjected to couples, a prismatic member experiences internal forces that maintain equilibrium. A couple, characterized by two equal and opposite forces, creates a moment but no resultant force. The internal forces at any section cut of the member must balance these external...
574
Deformations in a Symmetric Member in Bending
485
When analyzing the deformation of a symmetric prismatic member subjected to bending by equal and opposite couples, it becomes clear that as the member bends, the originally straight lines on its wider faces curve into circular arcs, with a constant radius centered at a point known as Point C. This phenomenon helps to understand the stress and strain distribution within the member more clearly.
When the member is segmented into tiny cubic elements, it is observed that the primary stress...
When the member is segmented into tiny cubic elements, it is observed that the primary stress...
485
Perceiving Loudness, Pitch, and Location
959
The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by...
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by...
959
Beams with Symmetric Loadings
391
The moment-area method is an analytical tool used in structural engineering to determine the slope and deflection of beams under various loads. Consider a cantilever with a concentrated load and moment at the free end. The first step is constructing a free-body diagram to calculate the reactions at the fixed end. Next, the bending moment diagram is plotted to visualize how the bending moment varies along the beam's length, focusing on points where the bending moment equals zero.
The M/EI...
The M/EI...
391
Gravitation Between Spherically Symmetric Masses
1.3K
The gravitational potential energy between two spherically symmetric bodies can be calculated from the masses and the distance between the bodies, assuming that the center of mass is concentrated at the respective centers of the bodies.
1.3K
Fixed Action Patterns
17.6K
A fixed action pattern (FAP) is a specific, hard-wired sequence of behaviors that occurs in response to an external stimulus, called a sign stimulus. The behavior is “fixed” because it is essentially unchangeable—proceeding similarly across individuals of a species every time it occurs.
17.6K

