Related Experiment Video
Updated: Jan 21, 2026
08:42
Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex
Published on: February 8, 2020
11.2K
Ocular causes of visual distortions.
Corey J Rowland1, Lawrence R Lee2
1MBBS, Clinical Fellow, City Eye Centre, Brisbane, Qld.
Australian Journal of General Practice
|August 2, 2019
Summary
General practitioners can diagnose visual distortions by taking a detailed patient history and performing simple eye exams. Early identification of macular pathologies is crucial for timely treatment and referral.
Area of Science:
- Ophthalmology
- Primary Care Medicine
Background:
- Patients with visual distortions often consult general practitioners (GPs).
- Visual distortions range from blurred vision to color aberrations.
- Prompt assessment is vital to rule out sight-threatening conditions.
Purpose of the Study:
- To guide GPs in evaluating visual distortion complaints.
- To outline common ocular causes, emphasizing macular pathologies.
Main Methods:
- Directed patient history taking.
- Office-based examinations including visual acuity.
- Amsler's grid testing and fundoscopy.
Main Results:
- History and basic eye exams provide key diagnostic clues.
- Simple tests can identify pathologies causing visual distortions.
- Knowledge of macular diseases aids GP assessment.
Conclusions:
- GPs can effectively assess visual distortions.
- Early detection of macular issues improves patient outcomes.
- Appropriate referral and management are facilitated by GP knowledge.
Related Concept Videos
01:02¹H NMR: Interpreting Distorted and Overlapping Signals
1.5K
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
1.5K
01:26Visual System
1.7K
Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
Once through the pupil, the light passes through the lens, a...
1.7K
01:12Visual Agnosia
1000
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...
1000
01:22Photoreceptors and Visual Pathways
8.8K
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,...
8.8K
01:08The Availability Heuristic
6.9K
A heuristic is a general problem-solving framework (Tversky & Kahneman, 1974). You can think of these as mental shortcuts that are used to solve problems. Different types of heuristics are used in different types of situations, and the impulse to use a heuristic occurs when one of five conditions is met (Pratkanis, 1989):
6.9K
01:08Nucleotide Excision Repair
40.6K
Overview
40.6K