![]() The long-fingered lemur aye-aye has big yellowish-orange eyes that help them see clearly in the dark. This gives them the scope to view two objects at the same time. These chameleons can move each of their eyes separately, independent of the other. Their eyes have a scaly, cone-shaped lid with a small and round opening at the center to accommodate the pupil. The ostrich’s eyes are even five times bigger than humans or any land-dwelling animal. Their eyes are the largest among all birds, 5 cm in diameter when measured from front to back similar to a pool ball’s size. Their big eyes in front of their head give them the visual acuity needed for capturing prey even when in flight. According to scientists, the blue color helps capture more light during the colder months, contributing to better vision when it is dark. The tissues in their eyes change from golden in summer to bluish during winter. Studies show that reindeers can see lights with short wavelengths of as much as 320 nm, which is way below the human capacity of 400 nm. Of the several uses, its massive eyes help it in detecting prey. The eyes are around 27 cm wide, as big as a soccer ball. They have the largest eyes measured in any species of the animal kingdom. Their eyes are large and brown, reflecting yellowish-white or greenish-white light in the moonlight. A layer of tissues (tapetum lucidum) in their eyes improves their vision in low light. They have forward-facing eyes, which give them a three-dimensional vision. Their color vision in low light appears 350 times more sensitive than humans. When they have to clear their corneas of dust and dirt, they end up licking them since these reptiles cannot blink. Instead, they have thin and transparent membranes covering each eye’s surface. Their eyes look increasingly large since most geckos lack eyelids to cover them partially. Another striking feature is their long grayish tail, half the length of their head and body. Their sensitivity to light is six times greater than humans because of the tapetum lucidum or tissues present within. Their large eyes give them the clear vision needed to forage at night. The margay is nocturnal, preferring to hunt when it is dark. The nocturnal Philippine tarsier is one of the most significant tarsiers. They have an immovable socket and the largest eye-to-body weight ratio among all mammals. This is so perfectly orchestrated by the master designer of the human body that we may see it as still another sign of the sacredness of birth, and of divinity.These tiny tree animals stand out because of their big eyes that remain fixed in their skull, contributing to their sharp night vision. There, the collagen tissue forms parallel to each other allowing for transparency, which allows us to see. It is fascinating to know that the collagen tissue in the human body forms a criss-cross pattern everywhere except one place – the eyes. This is due to the eyeball adjusting in length for good eyesight.Īnother interesting fact about eyes involves the collagen tissue. A new mother is acutely aware that as her baby grows, he becomes more aware of the environment being able to see farther and this encourages him to use neck and head motions, thus strengthening those muscles, to follow objects at greater distances. At birth babies have “short” eyeballs and this makes them hyperopic. Stimuli from the external environment do change the axial length in human eyes. According to the text General Ophthalmology (Vaughan, Asbury and Riordan-Eva, Appleton & Lange, Stamford, 1999), the size of the eyeball at birth averages 16.5 mm from front to back as compared to adults where it is 24.2 mm. But Howland notes that the front-to-back length will increase somewhat and then our eyes will begin to move more apart from each other as the head grows. This is just another wonder of the workings of the human body.įrom outward appearances, by three months, our eyes are the same size that they will ever be as the corneas have reached their full width. But it also has a behavioral characteristic – that of dilating the baby’s eyes at the moment of birth so he/she can see his/her mother more clearly. It has the physical characteristic of helping a woman in labor to birth her baby. Those big eyes! In a normal, physiological birth, the hormone adrenalin plays an interesting role.
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