Defects of vision | Myopia and Hypermetropia | The Human Eye 3d Animation

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Human Eye and colorful world class 10 full chapter | Human Eye 3d Structure | Myopia & Hyperopia
Light waves from an object enter the eye through cornea. Which is transparent dome located in the front of the eye.
Light passes through the Iris colored ring shape membrane located behind the cornea.
The Opening of the iris is called the pupil. Change in the intensity of incoming light changes the size of pupil.
In brighter light the pupil constricts and in dimmer light its dilates.
Light rays are converges by crystal lens located behind the iris to a nodal point. Where image of the object reverse and inverted.
The light continuous to the vitreous humour a clear gel substance its fill up the eye and focuses on the retina.The retina is a light sensitive structure made up of rods and cones. Rods sense the intensity of the light and the cones sense the color.
This signals transmitted to the optic nerve to the visual to the center of the brain in the occipital lobe. The Brains translate the electrical signals into an upright image.
Common Vision Problems
Myopia or Nearsightedness is a visual abnormality in this condition eye focuses the image of the distant object in front of the retina instead on the retina as a result blurred image formed. Myopia can be corrected by concave lens.

Hyperopia or Longsightedness) the eyes focuses the image behind the retina Hyperopia can be corrected by convex lens.
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