The Optics Of The Eye Essays

1170 Words Oct 10th, 2014 5 Pages
Before any technology or information could be gathered about how people see differently scientist had to know how the eye works. The eye has different parts to allow it to see. The light fist comes in through the pupil of the eye. The human eye then has lens and an iris diaphragm that works just like a camera. The optics of the eye projects an upside-down image of the objects on the rear and inner surface of the eyeball also know as the retina. Once the image is projected, a dense covering of light-sensitive photoreceptors converts light or photons, into electrochemical signals which are then processed by neural circuits in the retina and transmitted to the brain. Photoreceptors are organisms that will respond to something once light falls over it. The Ganglions are a type of neuron located in the retina that receive signals from various intermediate cells from the cones and rods. They are the cells that transmit the information to the brain.
Other parts of the eye work so that people can see in color and how we can see in low light. The rods, which are more numerous than cones, are responsible for our vision in dim light but don’t function in bright light. Cones are active at high light levels and allow us to see color in fine detail directly at what is in front of us. Rods are responsible for our night vision but cannot distinguish color. At night we don’t see what’s in front of us as easily because our eyes are more sensitive at night then in the day.
The cones are…

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