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In Sindh, some Muslim Sindhi women apply a black dot or line by "Kajjal or Surmo " on the forehead and chin, and sometimes three dots or lines around eyes as part of historic Indian traditions that have continued post-Partition. As an amulet believed to protect against evil-eye, these dots are called Tikro or Tilk (singular), or Tikra (plural).
The head of a mantis showing the black pseudopupil in its compound eyes The eye of a mantis shrimp has three regions, each with its own pseudopupil.. In the compound eye of invertebrates such as insects and crustaceans, the pseudopupil appears as a dark spot which moves across the eye as the animal is rotated. [1]
Visual snow syndrome (VSS) is an uncommon neurological condition in which the primary symptom is that affected individuals see persistent flickering white, black, transparent, or colored dots across the whole visual field. [7] [4] Other common symptoms are palinopsia, enhanced entoptic phenomena, photophobia, and tension headaches.
The Turkish boncuk (sometimes called a göz boncuğu or eye bead) is a glass bead characterized by a blue glass field with a blue white and black dot superimposed on a white or yellow center. A design of great antiquity, the blue bead has gained importance as an item of popular culture in modern Turkey.
After about two weeks, the red spot on your eye should disappear. Learn more about weird changes in your body—read up on 42 strange symptoms that signal serious disease.
An example of the scintillating grid illusion. Dark dots seem to appear and disappear at intersections. The scintillating grid illusion is an optical illusion, discovered by E. and B. Lingelbach and M. Schrauf in 1994. [2] It is often considered a variation of the Hermann grid illusion but possesses different properties. [2] [3]
Ask to cover one eye with hand or occluder and look directly at the center black dot. While looking directly at the center dot, and observe the grid whether patient can see all corners and sides of grid. If any lines or areas look blurry, wavy, dark or blank mark that area in chart and consult ophthalmologist. Follow the same steps with the ...
A retinal tear may also allow fluid to leak behind the retina, causing it to detach. This will often leak blood into the vitreous, which is seen by the patient as a sudden appearance of numerous small black dots or ribbons moving across the field of vision. Sometimes a gray curtain may appear to partially block vision in one eye.