A close-up photograph of what appears to be a light-brown human eyeball shows the organ's expansive, cavernous depths surrounding a seemingly bottomless, black pit that, together, mimics the ...

Healthy human pupils are perfectly round circles ... To test this, your doctor will shine a bright light in your eyes and watch what your pupils do. If they don’t get smaller, there might ...

It circulates throughout the front part of your eye and keeps the pressure inside constant. After the aqueous humor, light passes through the pupil. This is the central round opening in your iris ...

Iris is a pigmented structure. Eye color (black, brown, blue etc.) is defined by the pigmentation of iris. The central aperture of iris is called pupil. It is circular in shape, and allows light ...

Like most human traits, blue eyes are determined by genes ... the ring that surrounds the black pupil in the middle of your ...

This means the pupils at the center of the eye become very small and may stop ... Doctors divide the human nervous system into the central nervous system (CNS), which consists of the brain and ...

A Quick Look at the Eye The human eye is an incredible feat of biology ... to bend and focus the incoming light as it enters the pupil. The iris, or the colorful part of the eye, regulates ...

To approach a question 400 million years in the making, researchers turned to mudskippers, blinking fish that live partially out of water. A magnified view of the human eye shows the pupil, the ...

The ETH researchers developed a new method for examining the changes in people's pupils while asleep: using a special adhesive technique and a transparent plaster, they were able to keep the eyes ...