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  • Trace the sequence of events which occur when a bright light is focused on your eyes.      

Trace the sequence of events which occur when a bright light is focused on your eyes.

 

 

 

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Sequence of Events when Bright Light is Focused on the Eyes:

  1. Stimulation of Retina:

    • Bright light falls on the retina (light-sensitive layer of the eye).

    • The photoreceptor cells (rods and cones) get stimulated.

  2. Message to the Brain:

    • The optic nerve carries these impulses to the brain (midbrain).

  3. Reflex Action by Brain:

    • The brain sends signals to the circular muscles of the iris.

  4. Constriction of Pupil:

    • The circular muscles of the iris contract, while the radial muscles relax.

    • This causes the pupil to constrict, reducing the amount of light entering the eye.

Posted by

Saumya Singh

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