10 most difficult eyes riddles A list of eyes related questions that are most often answered incorrectly Zoology quiz Which desert has this famous "eye"?Sahara. The Richat Structure in Mauritania, also known as the Eye of the Sahara, was interpreted as an asteroid impact structure, but no evidence for shock metamorphism has been found. Today scientists believe that it is a huge (40 km in diameter) and deeply eroded geologic dome.very hard 24% NamibNamib19%GobiGobi31%SaharaSahara24%MojaveMojave24%Created by: globalquiz.org. Statistics based on 7762 answers in 3 languages »deserts of Africa riddles » What is the color of eyes of owls that hunt at night?Black. Owl's eye colour depends on the time of day in which they hunt. The ones that hunt during daylight have yellow eyes. The ones that hunt at night but also at the evenings and mornings have orange eyes. Black eyes are typical to owls that hunt only at night.very hard 28% yellowyellow21%blackblack28%orangeorange13%it doesn't matter, all owls hunt at nightit doesn't matter, all owls hunt at night36%Created by: Ninjai. Statistics based on 348 answers in 2 languages »ecology riddles » Which of these concepts is NOT a color vision deficiency disorder ?Emmetropia is the state of vision where a faraway object at infinity is in sharp focus with the eye lens in a neutral or relaxed state. Protanopia, Deuteranopia, Monochromacy - color blindness, also known as color vision deficiency, is the decreased ability to see color or differences in color. very hard 36% Protanopia Protanopia 12%DeuteranopiaDeuteranopia17%EmmetropiaEmmetropia36%MonochromacyMonochromacy34%Created by: Tschuka . Statistics based on 520 answers in 2 languages »medicine riddles » A person who has 4 types of color receptors is called ...Tetrachromat. Man is usually sensitive to about 500,000 colors. Tetrachromacy is the condition of possessing four independent channels for conveying color information, or possessing four types of cone cells in the eye. Organisms with tetrachromacy are called tetrachromats which can see up to 99 million shades. very hard 36% Such people do not existSuch people do not exist20%QuatroculusQuatroculus34%ChromosomChromosom9%TetrachromatTetrachromat36%Created by: Tschuka . Statistics based on 1827 answers in 2 languages »anatomy riddles » What was the color of Jesus' eyes?Brown. The Scriptures tell us that Jesus didn’t look different from an ordinary Jewish man of His time. Any other color of eyes than brown would have been surely noted down. In the 2004 movie, The Passion of the Christ, Jesus was portrayed by Jim Caviezel who had his blue eyes digitally changed to brown.hard 40% brownbrown40%blueblue24%greygrey2%it is not knownit is not known32%Created by: Kinga H. Statistics based on 9263 answers in 5 languages »Jews riddles » Which living creature has the largest eyes?The giant squid. Giant squids have the largest eyes of any living creature except perhaps colossal squid – over 30 centimeters (1 ft) in diameter. Large eyes can better detect light (including bioluminescent light), which is scarce in deep water.hard 46% elephantelephant3%blue whaleblue whale17%the giant squidthe giant squid46%giraffegiraffe31%Created by: Kasia. Statistics based on 14342 answers in 2 languages »animal records riddles » Which part of a dog's or a cat's eye reflects the light?A layer behind retina. Many vertebrates, especially nocturnal ones, have the reflecting layer called tapetum lucidum. It reflects the light back through the retina, increasing the amount of light available to the photoreceptors. hard 49% conjuctivaconjuctiva10%pupilpupil16%irisiris23%a layer behind retinaa layer behind retina49%Created by: globalquiz.org. Statistics based on 18069 answers in 2 languages »cats riddles » Who should you expect to show stronger red-eye effect?Blue-eyed people. The iris plays no role in the effect, but the blue-eyed people have relatively low melanin in the fundus as well. Therefore, they show a much stronger red-eye effect, as the light passing fundus is not absorbed by melanin. The role of melanin in red-eye effect is nicely demonstrated in case of heterochromia (one eye blue, one brown): typically, only the blue eye displays the effect.hard 54% blue-eyed peopleblue-eyed people54%brown-eyed peoplebrown-eyed people16%elderselders1%there is no differencethere is no difference27%Created by: Kantapat Rassamee. Statistics based on 8963 answers in 4 languages »light riddles » What animal is that?Goat. The horizontal pupils allow wide panoramic vision. Because goats' irises are usually pale, their pupils are much more noticeable than in animals such as cattle, deer, horses and sheep, whose similarly horizontal pupils blend into a dark iris. average 66% camelcamel22%goatgoat66%kangarookangaroo9%dogdog1%Created by: globalquiz.org. Statistics based on 18560 answers in 2 languages »mammals riddles » Why do cats have vertical pupils?To better see in the dark. The sharpest image is produced by round pupils, and if cats weren’t nocturnal, they probably would have round pupils like us. But the vertical pupil, in combination with horizontal eyelids, gives the cat greater and more accurate control in different types of lighting. A cat may adjust the amount of light by moving eyelids only.easy 78% to have sharper visionto have sharper vision17%to better see in the darkto better see in the dark78%to be more attractiveto be more attractive1%it is a useless mutationit is a useless mutation3%Created by: globalquiz.org. Statistics based on 26015 answers in 3 languages »optics riddles » Play zoology quiz and see all the questions.