THE HUMAN EYE

The human eye is a sophisticated organ that allows you to see the world around you. But how does it work?

The eye has different parts that all participate and string together to allow you to see. One of these 'parts' is called the retina. The retina is a sensitive layering of tissue right of the back of the eye. When light hits the retina, there are special cells called photoreceptors that use these light rays and turn them into electrical signals. These signals travel from the retina through the optic nerve to the brain which turns the signals into the images we are able to see

What is color blindness?

Color blindness is almost always genetic. The words 'color blindness' are actually misleading, because color blind people can actually see color, just the colors lie closer together and are overall less vibrant Color blindness itself occurs because certain color sensitive cells, called cones, are either damaged or missing. The majority of color vision deficiency cases (color blindness) are because of genetic default.

How does light enter the eye in the first place?

The light enters the eye through the cornea. The cornea is a bit like a contact lesnse, in that it is clear, dome shaped, and covers the surface of the eye. From that cornea, the light then passes through the pupil onto the iris (the colored part of your eye) which controls how much light passes through to the retina

If you have ever shone a light near your eye (preferably don't) you will notice that the iris will become smaller This is the measure it takes to ensure that your eye isn't blinded or overwhelmed by light.