enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Ciliary muscle - Wikipedia

    en.wikipedia.org/wiki/Ciliary_muscle

    The ciliary muscle is an intrinsic muscle of the eye formed as a ring of smooth muscle [3] [4] in the eye's middle layer, the uvea (vascular layer).It controls accommodation for viewing objects at varying distances and regulates the flow of aqueous humor into Schlemm's canal.

  3. Ciliary body - Wikipedia

    en.wikipedia.org/wiki/Ciliary_body

    The aqueous humor then flows through the pupil into the anterior chamber. [3] The ciliary body is attached to the lens by connective tissue called the Zonule of Zinn (fibers of Zinn). Relaxation of the ciliary muscle puts tension on these fibers and changes the shape of the lens in order to focus light on the retina.

  4. 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 ...

  5. 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.

  6. Optic nerve - Wikipedia

    en.wikipedia.org/wiki/Optic_nerve

    The accommodation reflex refers to the swelling of the lens of the eye that occurs when one looks at a near object (for example: when reading, the lens adjusts to near vision). [1] The eye's blind spot is a result of the absence of photoreceptors in the area of the retina where the optic nerve leaves the eye. [1]

  7. Accommodation reflex - Wikipedia

    en.wikipedia.org/wiki/Accommodation_reflex

    Light from a single point of a distant object and light from a single point of a near object being brought to a focus. The accommodation reflex (or accommodation-convergence reflex) is a reflex action of the eye, in response to focusing on a near object, then looking at a distant object (and vice versa), comprising coordinated changes in vergence, lens shape (accommodation) and pupil size.

  8. Common tendinous ring - Wikipedia

    en.wikipedia.org/wiki/Common_tendinous_ring

    The common tendinous ring spans the superior orbital fissure and can be described as having two parts – an inferior tendon which gives origin to the inferior rectus muscle, and to part of the lateral rectus muscle; and a superior tendon which gives origin to the superior rectus muscle, and to part of the medial and lateral recti muscles.

  9. Visual system - Wikipedia

    en.wikipedia.org/wiki/Visual_system

    An opsin absorbs a photon (a particle of light) and transmits a signal to the cell through a signal transduction pathway, resulting in hyper-polarization of the photoreceptor. Rods and cones differ in function. Rods are found primarily in the periphery of the retina and are used to see at low levels of light. Each human eye contains 120 million ...