The human eye forms the image of an object at its

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  1. Cornea
  2. Iris
  3. Pupil
  4. Retina

Answer (Detailed Solution Below)

Option 4 : Retina
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Detailed Solution

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The correct answer is Retina.

Key Points

  • The retina is a light-sensitive layer of tissue located at the back of the inner eye.
  • It functions like the film in a camera, receiving the image formed by the lens.
  • The retina converts light into electrical signals, which are sent to the brain via the optic nerve.
  • Photoreceptor cells, namely rods and cones, are essential components of the retina, responsible for vision in low light and color vision, respectively.

Additional Information

  • Cornea
    • The cornea is the transparent, dome-shaped surface that covers the front of the eye.
    • It helps to focus incoming light onto the retina.
    • The cornea provides approximately 65-75% of the eye's total focusing power.
  • Iris
    • The iris is the colored part of the eye surrounding the pupil.
    • It controls the size of the pupil and thus the amount of light that enters the eye.
  • Pupil
    • The pupil is the black circular opening in the center of the iris.
    • It regulates the amount of light that enters the eye by expanding and contracting.
  • Photoreceptors
    • There are two main types of photoreceptors: rods and cones.
    • Rods are responsible for vision in low light conditions, while cones are responsible for color vision and detail in bright light.
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