By keeping the bulb in the center and orbiting the blue gel (for the iris) and the opaque disk (for the pupil) around the bulb, the eye can appear to gaze in different directions. By adjusting the ...

In this video, learn about different parts of the human eye and how our sight works. Follow me please class ... That coloured circle is called the iris and the black spot in the middle is the ...

It's so well constructed. You've got the iris, the cornea, the pupil, and the sclera, are all working together to allow us to see. The eye muscles have to be fast. Just to track an object involves ...

Like most human traits, blue eyes are determined by genes, and no two people have exactly the same hue. It works a lot like ...

Learn about the anatomy of your eyes and how each part of the eye works in order to create visual output. Does your baby really need an eye exam in their first year? Absolutely. The smaller and ...

The gleaming yellow-gold eyes of a bobcat reflect late afternoon light as the thirsty cat laps tepid water. It is this life ...

We present a case of unilateral, secondary open-angle glaucoma due to an underlying diffuse iris melanoma. The patient was referred by his ophthalmologist with uncontrolled, elevated intraocular ...

"Previously, the FBI used only fingers, but now they recognise the value of bringing the eyes in as well," says Murad. But iris recognition technology might not always work. "If the person is wearing ...