Question

information on sensory organ eye

Answer 1

Eye. ... Eyes are organs of the visual system. They provide organisms with vision, the ability to receive and process visual detail, as well as enabling several photo response functions that are independent of vision. Eyes detect light and convert it into electro-chemical impulses in neurons.

Answer 2

Eyes are highly developed photosensitive organs for analyzing the form, intensity, and color of light reflected from objects and providing the sense of sight. Protected within the orbits of the skull which also contain adipose cushions, each eyeball consists externally of a tough, fibrous globe that maintains its overall shape. Internally the eye contains transparent tissues that refract light to focus the image, a layer of photosensitive cells, and a system of neurons that collect, process, and transmit visual information to the brain.

The sagittal section of an eye shows the interrelationships among the major ocular structures, the three major layers or tunics of the wall, important regions within those layers, and the refractive elements (cornea, lens, and vitreous).

Each eye is composed of three concentric tunics or layers:

1. A tough external fibrous layer consisting of the sclera and the transparent cornea;
2. A middle vascular layer that includes the choroid, ciliary body, and iris; and
3. An inner sensory layer, the retina, which communicates with the cerebrum through the posterior optic nerve

Not part of these layers, the lens is a perfectly transparent biconvex structure held in place by a circular system of zonular fibers that attach it to the ciliary body and by close apposition to the posterior vitreous body. Partly covering the anterior surface of the lens is an opaque pigmented extension of the middle layer called the iris, which surrounds a central opening, the pupil.

Located in the anterior portion of the eye, the iris and lens are bathed in clear aqueous humor that fills both the anterior chamber between the cornea and iris and the posterior chamber between the iris and lens. Aqueous humor flows through the pupil that connects these two chambers.

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