24 eye_lecture_oct_20_2007a_nxpowerlite_

24 eye_lecture_oct_20_2007a_nxpowerlite_ - The eye Its a...

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The eye It’s a vision thing
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Retina Absorb photons of light Transduce photons absorption into electrical signal Process electrical signal into coded message Send to brain via cranial nerve II
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http://webslides.heath.ufl.edu slide (39-e)
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Fovea The resolving power of the retina is not uniform throughout its surface Dimple-like area area where vision has its best resolution Central vision
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http://webslides.heath.ufl.edu slide (39-e)
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Constraints on eye design Highest acuity is in fovea (1mm diameter). Therefore, images must be precisely focussed on fovea. Need good dioptric apparatus Need delicate retina held in position relative to focussing apparatus Tissues in front of retina must be transparent
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Nature’s solution Tough coat around retina Posterior opaque, sclera Anterior transparent, cornea Fill globe with fluid under pressure
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Sclera Type I collagen Randomly arranged Reflect all wavelengths of light
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This note was uploaded on 01/04/2012 for the course ANT 610C taught by Professor Johnaris during the Spring '10 term at University of Florida.

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24 eye_lecture_oct_20_2007a_nxpowerlite_ - The eye Its a...

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