Visual system
The sensory system for vision is called the visual system.
Components[edit | edit source]
The eye, the nervous system, and light interact and work together to produce the gift of vision as we see objects.
How vision works?[edit | edit source]
The following 7 steps help us see the objects that we visually see though our eyes.
- Step 1: The light passes through the cornea which is shaped like a dome and bends light to help the eye focus.
- Step 2. This light enters the eye through an opening called the pupil
Note that the iris controls how much light the pupil lets in.
- Step 3: Light passes through the lens
- Step 4: The lens works together with the cornea to focus light correctly on the retina.
- Step 5: When light hits the retina, special cells called photoreceptors turn the light into electrical signals.
- Step 6: These electrical signals travel from the retina through the optic nerve to the brain.
- Step 7: Then the brain turns the signals into the images you see.
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