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The Eyes of the Falcon

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saggi tall

on 12 January 2015

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Transcript of The Eyes of the Falcon

The Eyes of The Falcon
Introduction
The Falcon has one of the sharpest eyes of the animal kingdom. Years of evolution have allowed them to be able to move at incredible speeds and still keep focused on their prey. This is all because of their amazing eyes
Special Features
Falon Eyes are 4-8 times bigger than Human eyes, and have 1,000,000 receptors per mm
Falcons Have 2 fovea in total, while humans have 1, this makes their vision shaper than humans
Their Fovea have more Cones cells than human eye, which makes their vision sharper and more focused
Structure and Function
Tube shaped eye to produce a larger retinal image
More Cone cells which let them see greater distances
Prominent ridge of feathers above eye gives protection from dust and wind
Fovea is lens shaped, increasing the effectivness of the light receptors even futher
Sharpest eyes in the animal kingdom
Special Features Cont.
Larger number of receptors, increases visual activity
More forward facing eyes than majority of birds give them binocular vision in front of them
Color Vision
Falcons have more Cone cells which allow them to see more light than humans
Falcons can process four types of light, while humans can only process three, this allows them to see up to the ultra-violet light spectrum
Ultra-violet light is shorter wave-lengths than vthe visible light-spectrum for humans, which means that Falcons can see shorter wave lengths than humans
How This Helps Them Survive
Their superior fovea allow them to see sharper images and focus on prey easier
Their lens shaped (convex) fovea allow them to see to see ultra-violet light, this may allow them to see urine trails left by their prey
The Falcons duel fovea allow them to keep focus on their prey even while they are diving at speeds up to 320 k/ph
A Falcon Diving
Labeled Diagrams
Falcon Eye
Human Eye
Table of comparison
Interesting Facts!
Falcons are the fastest moving animal in world, diving at over 320 kilometers per hour!
The peregrine falcon's name in latin is pereginus meaning "To Wander"
Falcons have some of the longest ranges of any bird, they have a presence on every continent except Antartica
There is an entire sport based off of making falcons hunt called "Falconry"
The Human Eye
The human eye is worse compared to the Falcons eye. But the humans eye has not evolved around focusing and hunting prey at insane speeds like the Falcon's has. This means that the humans eye is not as good, but is still an impressive struture in its own respect
Function and Structure of the Human Eye
The humans eye is less sophisticated the Falcons eye
The eyes structure is more circular shaped than the Falcons eye, to help focus on near objects as well as far ones
The Human eye only has 1 fovea compared to the Falcon which has 2, this means that humans cannot focus on objects as well
The human fovea is not convex like the falcons, this means that our image is not as focused as theirs
Humans have less cone and rod receptors, that means our night vision is worse than theirs
Less rod cells means that our night vision is also not as good as the falcons
Ray Diagram of Human Eye
Near and Far Sighted Vision
Near Sighted Vision
Near sighted vision means that the eye cannot focus on images that are far away
Myopia is usually caused when the distance between the lens and retina is to long
Myopia can be corrected with Concave lenses
Near sighted Vision
Far sighted Vision
Far sighted vision means that the eye cannot focus on images that are close to the eye
Hyperopia is caused when the distance between the lens and retina is to short
Hyperopia can be corrected with convex lenses
Far Sighted Vision
Corrective Lenses
Near sighted corrective lenses
Near sighted vision can be fixed with concave corrective lenses
Concave lenses diverge the light before it enters the eye and hits the retina, letting the eye focus on distant objects
Concave lens ray diagram
Far sighted corrective lenses
Far sighted vision can be fixed with convex corrective lenses
Convex lenses converg the light before it enters the eyes and hits the retina, letting the eye focus on close-by objects
Convex lens ray diagram
Glossary
Cone Cell
– Responsible for color vision inside of the eye
Rod Cell
– Responsible for the amount of light coming into the eye (Night vision)
Hyperopia
– Medical name for far sighted vision
Myopia
– Medical name for near sighted vision
Fovea
– means “pit” in Latin, refers to a depression in a structure
Wavelength
– The distance between the crest of a wave
Receptor
– Organ or cell able to respond to light
Humor
– Medical name for any type of fluid or moisture
Light Spectrum
– The range of wavelengths that the eye can see
Retina
– Layer of skin at the back of the eye which senses light

Literacy Citied
1. Ödeen, A. (2013, February 11). The phylogenetic distribution of ultraviolet sensitivity in birds. Retrieved January 12, 2015, from http://www.biomedcentral.com/1471-2148/13/36

2. Use of lenses for correcting vision. (n.d.). Retrieved January 12, 2015, from http://www.passmyexams.co.uk/GCSE/physics/use-of-lenses-for-correcting-vision-eyesight.html

3. Journey North Bald Eagles. (n.d.). Retrieved January 12, 2015, from http://www.learner.org/jnorth/tm/eagle/VisionA.html

4. Garrity, J. (n.d.). Structure and Function of the Eyes. Retrieved January 12, 2015, from http://www.merckmanuals.com/home/eye_disorders/biology_of_the_eyes/structure_and_function_of_the_eyes.html
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