How does the eye work?

Light rays enter the front of our eye through the clear cornea and lens.

The cornea and lens bend light so that it can focus on the retina at the back of our eye. This gives us a clear, precise image.

The retina at the back of the eye is a light-sensitive layer which consists of rod and cone cells. These cells collect the light signals directed onto them and send them as electrical signals to the optic nerve at the back of our eye.

The optic nerve is made up of thousands of nerve fibres. These fibres pass the electrical signals along to our brain where they are processed into the image we are looking at.

Further information can be found in our How the eye works factsheet:

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