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The Cornea

Retina

  • The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber
  • The cornea, with the anterior chamber and lens, refracts light, with the cornea accounting for approximately two-thirds of the eye's total optical power
  • The retina is a layered structure with several layers of neurons interconnected by synapses.
  • The only neurons that are directly sensitive to light are the photoreceptor cells.
  • These are mainly of two types: the rods and cones.

The Iris

  • The iris (plural: irides or irises) is a thin, circular structure in the eye, responsible for controlling the diameter and size of the pupil and thus the amount of light reaching the retina.

The Pupil

The Lens

The pupil is a hole located in the center of the iris of the eye that allows light to enter the retina

The Lens

The crystalline lens is a transparent, biconvex structure in the eye that, along with the cornea, helps to refract light to be focused on the retina

Blind Spot

the transparent structure behind the pupil that changes shape to help focus images on the retina

the point to which the optic nerve leaves the eye, creating a “blind” spot because no receptor cells are located there.

Optic Nerve

the nerve that carries neural impulses from the eye to the brain.

The Eye

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