enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Iris (anatomy) - Wikipedia

    en.wikipedia.org/wiki/Iris_(anatomy)

    The iris (pl.: irides or irises) is a thin, annular structure in the eye in most mammals and birds that is responsible for controlling the diameter and size of the pupil, and thus the amount of light reaching the retina. In optical terms, the pupil is the eye's aperture, while the iris is the diaphragm. Eye color is defined by the iris.

  3. Human eye - Wikipedia

    en.wikipedia.org/wiki/Human_eye

    Schematic diagram of the human eye. It shows a horizontal section through the right eye. The eye is made up of three coats, or layers, enclosing various anatomical structures. The outermost layer, known as the fibrous tunic, is composed of the cornea and sclera, which provide shape to the eye and support the deeper structures.

  4. File:Schematic diagram of the human eye.png - Wikipedia

    en.wikipedia.org/wiki/File:Schematic_diagram_of...

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Donate

  5. Visual system - Wikipedia

    en.wikipedia.org/wiki/Visual_system

    The visual system is the physiological basis of visual perception (the ability to detect and process light).The system detects, transduces and interprets information concerning light within the visible range to construct an image and build a mental model of the surrounding environment.

  6. Mammalian eye - Wikipedia

    en.wikipedia.org/wiki/Mammalian_eye

    Diagram of a human eye; note that not all eyes have the same anatomy as a human eye. The mammalian eye can also be divided into two main segments: the anterior segment and the posterior segment. [10] The human eye is not a plain sphere but is like two spheres combined, a smaller, more sharply curved one and a larger lesser curved sphere.

  7. Intraocular muscles - Wikipedia

    en.wikipedia.org/wiki/Intraocular_muscles

    The pupillary sphincter muscle and pupillary dilator muscle control the iris to adjust the size of the pupil to adjust how much light enters into the eye. The pupillary dilator muscle increases the pupillary diameter and it is arranged radially, but the pupillary sphincter muscle is responsible for the constriction of the pupil's diameter and ...

  8. File:Schematic diagram of the human eye en.svg - Wikipedia

    en.wikipedia.org/wiki/File:Schematic_diagram_of...

    Diagram of the human eye in English. It shows the lower part of the right eye after a central and horizontal section. ... Iris (anatomy) Lens (vertebrate anatomy ...

  9. Stroma of iris - Wikipedia

    en.wikipedia.org/wiki/Stroma_of_iris

    Some circle the circumference of the iris and the majority radiate toward the pupil. Blood vessels and nerves intersperse this mesh. In dark eyes, the stroma often contains pigment granules. Blue eyes and the eyes of albinos, however, lack pigment. Structure of the iris and surrounding parts showing the stroma of iris (stroma iridis).