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The Eye

Things we know about the eye
by

Nicole Calvert

on 8 April 2011

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Transcript of The Eye

The Eye The retina Focuses light on the retina Blind Spot and Complamentry Colours no cones or rods Ciliary Muscles Iris muscle Controls the veiwing of object Millions of Cones and rods produces images Has many blood vessels and nerves optic nerves and blood vessels concet to the retina bands of muscels behind the pupil if you look at the cross, close your right eye and move closer to the moniter, the dot should disappear this is because your eye has a blind spot similaritys -they both have lences -they can see near and far -See colour -be corrected by tecnlogy -they focus controlls the amount of light entering Colour Blindness People with colour blindness are not blind to colours, but are unable to see certain shades of colours clearly. Look at the dot in the red rectangle for 25 seconds. After, look at the dot the clear square. What do you notice??? Around the red rectangle should start to glow a light blue. Once you look at the clear rectangle, the clear rectangle should have a light blue glow too. focuses objects far and close by. The Lens & the Cornea Vision Problems When someone has myopia, they are able to see closer things clearly, but can't focus on far objects. When someone has hyperopia, they can focus on distant objects, but can not focus on objects up close. Astigmation is a condition where the cornea has an irregular curve. Usually, the cornea is evenly curved in all directions, making vision blurred in any direction. When people get older, they might get something called presbyopia. This the inability to focus on nearby and distant objects. The End
Optic Nerve The nerve signals from rods and cones are sent through the optic nerve. The raccoon can see in the dark because it has many rods and cones so that allows more light.
This helps it hunt and see preditors By Nicole and Sarah Normal vision & Corrective lenses 20/20 vision at 6m away corrective lenses first started with the early egyptians and romans they correct refractive vision problems normal vision is perfect vison from
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