The Human Eyes

The Blind Spot

You can test your blind spot by yourself.

The Blind Spot

A blind spot, scotoma, is an obscuration of the visual field. A particular blind spot known as the blindspot, or physiological blind spot, or "blind point", or punctum caecum in medical literature, is the place in the visual field that corresponds to the lack of light-detecting photoreceptor cells on the optic disc of theretina where the optic nerve passes through it. Since there are no cells to detect light on the optic disc, a part of the field of vision is not perceived. The brain interpolates the blind spot based on surrounding detail and information from the other eye, so the blind spot is not normally perceived.

Source : Wikipedia

An Eye

A Pigs Eye

In the Biology classes we had the chance to dissect the of the eye of a pig. This helped a lot to understand our topic, having the opportunity, to not only learn out of the textbook but also and visual example in front of one. 

A Diagram of an Eye

The human eye is an organ which reacts to light for several purposes. As a conscious sense organ, the mammalian eye allowsvision. Rod and cone cells in the retina allow conscious light perception and vision including color differentiation and the perception of depth. The human eye can distinguish about 10 million colors.

In common with the eyes of other mammals, the human eye's non-image-forming photosensitive ganglion cells in the retina receive the light signals which affect adjustment of the size of the pupil, regulation and suppression of the hormone melatonin andentrainment of the body clock.

(Source:) Wikipedia

The Human Eye