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Word Count: 867
Human senses are extremely powerful They effect perception of events people and situations that can impact state of mind and who they are The sensations receive through one sense combined with the other senses have the greatest influences over perception Sight hearing and smell are the strongest senses One of the most ranked important sense for humans is vision The way vision work is very complicated First light enters the eye through the pupil after that the light passes through the color part of the eye called the iris If the light is very bright the light in the iris contract to make the pupil smaller to protect the eye from damage The contraction of the muscle helps to see better in light In dim light the muscle must relax to open the pupil wider to let in as much light as possible In the pupil the light moves through the lens which focus light to focus on objects that are closer or farther away for the to focus on an object that is very close to the eye The tiny muscles around the lens contract and make the lens rounder and for far away objects the muscles work two flatten the lens Back regions of the retina there is a small spots called the fovea where images that pass through the lines are in a sharpest focus The retina contains the receptor cell the is responsible for vision Retina cells are sensitive for only a faction of spectrum of electromagnetic energy which includes light along with other energies The only wavelengths that the human eye are violet- blue and the longest are redThe transportation from the eye to the brain starts with the rods and cones The rods and cones are connected to bipolar cell They connect inter-neurons which they link up to receptor cells that
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