Nov 25, 2025 · The anatomy of the eye includes auxiliary structures, such as the bony eye socket and extraocular muscles, as well as the structures of the eye itself, such as the lens and the …

Oct 13, 2025 · In human anatomy, the iris is the colored, muscular part of the eye surrounding the pupil. The iris is in front of the lens and behind the cornea and is bathed in front and behind by …

Nov 17, 2025 · When light enters the eye, it passes through the cornea and the lens and is refracted, focusing an image onto the retina. Light-sensitive molecules in the rods and cones …

When light enters the eye, it passes through the cornea and the lens and is refracted, focusing an image onto the retina. Light-sensitive molecules in the rods and cones react to specific …

The human eye contains about 130 million rods and about 7 million cones. Rod cells have an elongated structure and consist of four distinct regions: an outer segment, an inner segment, …

Dec 1, 2025 · The human ear, like that of other mammals, contains sense organs that serve two quite different functions: that of hearing and that of postural equilibrium and coordination of …

A diagram of the structure of the human eye, showing the anterior and posterior chambers, which contain the aqueous humour, and the macula lutea, close to which lies the optic disk, or blind …

The photopigments that absorb light all have a similar structure, which consists of a protein called an opsin and a small attached molecule known as the chromophore.

What is the retina, and why is it important for vision? How does the optic nerve connect the eye to the brain? What determines the color of a person's eyes? How do all the parts of the eye work …

The human eye is roughly spherical. Light passes through its transparent front and stimulates receptor cells on the retina (cones for colour vision, rods for black-and-white vision in faint …