According to Merriam Webster Dictionary: Sight is “the physical sense by which light stimuli received by the eye are interpreted by the brain and constructed into a representation of the position, shape, brightness and color of objects in space” Did you know the eye is about 24mm wide in diameter? That's a little smaller than a gumball from a gumball machine. |
Eyelid
Blinking is both voluntary (you can blink when you want to) and involuntary (you automatically blink when you need to). Camilo wanted to know “Why do you have to blink to clean your eyes?” Blinking cleans the surface of the eye of debris and flushes fresh tears over the surface of the eye. Each blink brings nutrients to the eye surface structures keeping them healthy. Chloe wanted to know “Why can’t you stare for a long time?” Your eyes dry out and get irritated. | Eyelashes Cecilia wanted to know more about eyelashes. Eyelashes...
Did you know that according to a study by the Journal of the Royal Society Interface, eyelashes of mammals are one third the length of the animal’s eye. Eyebrows Cecilia wanted to know more about eyebrows. Eyebrows...
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Pupil
The students worked in teams where they shone a flashlight on a classmate's eye and observed what happened to the pupil. Then they came up with a hypothesis on the function of the pupil. According to the Exploratorium website “The pupil is an opening that lets light into your eye. Since most of the light entering your eye does not escape, your pupil appears black. In dim light, your pupil expands to allow more light to enter your eye. In bright light, it contracts.” | |
Iris According to Kid Health “The iris is the colorful part of the eye. When we say a person has blue eyes, we really mean the person has blue irises! The iris has muscles attached to it that change its shape. This allows the iris to control how much light goes through the pupil.” The color of the iris is based on the amount of melanin (a pigment). Your eye color does not significantly affect the sharpness of your vision. People with lighter eyes tend to be more sensitive to light. Eye color is a genetic trait. A person can have different eye color for each eye. A person’s eye color can change as they age. Eye color can change based on a person’s mood. | Sclera Carter asked “Why do you need eye whites” According to Kid Health "The white part of the eyeball is called the sclera. It provides protection and structure for the eye. The sclera is made of a tough material and has the important job of covering most of the eyeball. Think of the sclera as your eyeball's outer coat. Look very closely at the white of the eye, and you'll see lines that look like tiny pink threads. These are blood vessels, the tiny tubes that deliver blood, to the sclera. |