Visual system

The sensory system for vision is called the visual system.

File:Visual system1.jpg

Components

The eye, the nervous system, and light interact and work together to produce the gift of vision as we see objects.

How vision works?

The following 7 steps help us see the objects that we visually see though our eyes.

1. Step 1: The light passes through the cornea which is shaped like a dome and bends light to help the eye focus.

1. 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.

1. Step 3: Light passes through the lens

1. Step 4: The lens works together with the cornea to focus light correctly on the retina.

1. Step 5: When light hits the retina, special cells called photoreceptors turn the light into electrical signals.

1. Step 6: These electrical signals travel from the retina through the optic nerve to the brain.

1. Step 7: Then the brain turns the signals into the images you see.

Visual system Resources
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