The Senses

  • sight

  • smell

  • touch

  • taste

  • hear

The Iris Reflex

When we say ‘it’s too bright in here!’, it’s because our eyes are sending messages to our brain gets overloaded & dazed. Light receptors in the eye can be damaged by excess light.

  1. Cornea - Protects eye surface and focuses light rays into the eyeball.

  2. Lens(pupil) - Focuses light onto the focal point.

  3. Iris - Regulates the amount of light entering the eye.

  4. Suspensory Ligaments - Hold the lens in place.

  5. Ciliary Muscles - Change the shape of the lens, whether it’s contracting or dilating.

  6. Retina - Detects light

  7. Optical Nerve - Transmits impulses(messages) to the brain.

  8. Sclera - The white of your eye, protects it from injuries, and maintains the eye’s shape.

Binocular Vision - Animals with binocular vision have eyes close together and an overlapping field of view with enhanced depth perception, used to judge distance. The reason why animals, such as humans, have evolved to have binocular vision is because we need our good depth perception to catch prey.

Monocular Vision - Can only see on one side. Prey animals tend to have monocular vision so they can see predators coming from all directions. Some animals have both binocular and monocular vision.

How Does The Eye Focus?

The lens refracts light onto the focal point, on the retina. When the light doesn’t meet directly at the focal point,