Search results
Results From The WOW.Com Content Network
Oscillopsia may also be caused by involuntary eye movements such as nystagmus, or impaired coordination in the visual cortex (especially due to toxins) and is one of the symptoms of superior canal dehiscence syndrome. Those affected may experience dizziness and nausea.
Poor quality of vision, Photophobia, Heliophobia, Depersonalization and Derealization [2] Usual onset: Visual Snow can appear at any time, but it commonly appears at birth, late teenage years, and early adulthood. Causes: Unknown, [3] hyperexcitability of neurons and processing problems in the visual cortex [4] [5] Risk factors
Because rainbows are seen on the opposite side of the sky from the Sun, rainbows are more visible the closer the Sun is to the horizon. For example, if the Sun is overhead, any possible rainbow appears near an observer's feet, making it hard to see, and involves very few raindrops between the observer's eyes and the ground, making any rainbow ...
We also see the Rayleigh effect at play in: - Sunsets where the sky is red. Light has to pass through a larger part of the atmosphere when the sun is lower on the horizon.
Chatoyancy, cat's eye gems such as chrysoberyl cat's eye or aquamarine cat's eye; Chromatic polarization; Diffraction, the apparent bending and spreading of light waves when they meet an obstruction; Dispersion; Double refraction or birefringence of calcite and other minerals; Double-slit experiment; Electroluminescence; Evanescent wave
In teichopsia, migraine sufferers may see patterns that look like the shape of the walls of a star fort. As the scotoma area expands, some people perceive only a bright flickering area that obstructs normal vision, while others describe seeing various patterns. Some describe seeing one or more shimmering arcs of white or colored flashing lights.
Achromatopsia, also known as rod monochromacy, is a medical syndrome that exhibits symptoms relating to five conditions, most notably monochromacy.Historically, the name referred to monochromacy in general, but now typically refers only to an autosomal recessive congenital color vision condition.
The Amsler grid showing the visual perception of the left eye of a person experiencing metamorphopsia (straight lines appear bent or curved) [1] [2]. Metamorphopsia (from Ancient Greek: μεταμορφοψία, metamorphopsia, 'seeing mutated shapes') is a type of distorted vision in which a grid of straight lines appears wavy or partially blank.