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After cataract surgery, the natural lens, which filters blue light, is replaced with a synthetic lens that allows more blue light to pass through. This sudden increase in blue light reaching the retina causes the brain to perceive a blue tint in vision. This effect is temporary as the brain and eyes gradually adapt to the new lens.
A blue/turquoise bead with two, seven or nine small holes [70] resembling eyes around a necklace is often worn and is said to be protection from the evil eye. Some may also spit three times without saliva. It is said that people with green or blue eyes are more prone to the evil eye effect. [71] [citation needed] [clarification needed]
Blue field entoptic phenomenon has the appearance of tiny bright dots moving rapidly along squiggly lines in the visual field. It is much more noticeable when viewed against a field of pure blue light and is caused by white blood cells moving in the capillaries in front of the retina. White cells are larger than red blood cells and can be ...
By Susana Victoria Perez, Buzz60 If you think you have blue eyes, think again, they are actually tricking you! All eyes are really brown. According to CNN, Dr. Gary Heiting, a licensed optometrist ...
In a technique known as blue field entoptoscopy, the effect is used to estimate the blood flow in the retinal capillaries.The patient is alternatingly shown blue light and a computer generated picture of moving dots; by adjusting the speed and density of these dots, the patient tries to match the computer generated picture to the perceived entoptic dots.
The term cadejo is thought to have derived from the Spanish word cadena, meaning "chain"; the cadejo is at times represented as dragging a chain behind him. There is a fairly large member of the weasel family, the tayra , which is called a cadejo and is cited as a possible source of the legend.
A Turkish nazar boncuğu Eye beads or nazars – amulets against the evil eye – for sale in a shop.. An eye bead or naẓar (from Arabic نَظَر , meaning 'sight', 'surveillance', 'attention', and other related concepts) is an eye-shaped amulet believed by many to protect against the evil eye.
A hanging hamsa in Tunisia. The hamsa (Arabic: خمسة, romanized: khamsa, lit. 'five', referring to images of 'the five fingers of the hand'), [1] [2] [3] also known as the hand of Fatima, [4] is a palm-shaped amulet popular throughout North Africa and in the Middle East and commonly used in jewellery and wall hangings.