EYE vrs CAMERA......
 

[COLOR="Teal"][U][B][FONT="Palatino Linotype"][CENTER][SIZE="5"]EYE & CAMERA (Similarities & Differences) [/SIZE][/CENTER][/FONT] [CENTER][/B][/U][/COLOR] [IMG] http://usera.imagecave.com/eram/Eye-10-june.gif[/IMG]


[SIZE="5"][FONT="Comic Sans MS"][B]Similarities btwn EYE & CAMERA:[/B][/FONT][/SIZE]
[IMG]http://usera.imagecave.com/eram/evocam5.JPG[/IMG][/CENTER]

[U][FONT="Times New Roman"][SIZE="4"][COLOR="DarkOrchid"]Similarity #1::::Opening for Light to Enter: [/COLOR][/SIZE][/FONT][/U]

In Camera :Aperture
In Eye : Pupil

[U][FONT="Times New Roman"][SIZE="4"][COLOR="DarkOrchid"]Similarity #2::::Control the Amount of Light Entering Camera/Eye:
[/COLOR][/SIZE][/FONT][/U]

In Camera : diaphragm control size of aperture
In Eye : iris muscles control size of pupil

[U][FONT="Times New Roman"][SIZE="4"][COLOR="DarkOrchid"]Similarity #3::::Refraction of Light: [/COLOR][/SIZE][/FONT][/U]

In Camera : by glass biconvex lens
In Eye : mainly cornea ; lens, aqueous & vitreous humor

[U][FONT="Times New Roman"][SIZE="4"][COLOR="DarkOrchid"] Similarity # 4::::Object of light action to form image: [/COLOR][/SIZE][/FONT][/U]

In Camera : photosensitive chemicals on film
In Eye : photoreceptors(rods & cones) in retina


[U][FONT="Times New Roman"][SIZE="4"][COLOR="DarkOrchid"]Similarity # 5::::Absorb Excessive light to prevent multiple images formation[/COLOR][/SIZE][/FONT][/U]

In Camera : dark internal surface
In Eye : pigmented, dark choroids

[CENTER][U][FONT="Times New Roman"][SIZE="6"][COLOR="DarkOrchid"]Difference:
[/COLOR][/SIZE][/FONT][/U] [/CENTER]

[U][FONT="Times New Roman"][SIZE="4"][COLOR="DarkOrchid"] Focusing Mechanism: [/COLOR][/SIZE][/FONT][/U]

in Camera: change distance between lens & film
in Eye: change focal length of lens using ciliary muscles