Transcript Eye Anatomy - Cloudfront.net

EYE ANATOMY
EYE ANATOMY
http://everlastingelephants.blogspot.com/2009/08/what-is-eye-cataract.html
EYE ANATOMY

The orbital bone
The eye socket
 Eye is cushioned within orbit
by pads of fat


Lacrimal gland

http://commons.wikimedia.org/wiki/File:Eye_orbit_anatomy_anterior2.jpg
Produces tears
http://mwsu-bio101.ning.com/forum/topics/distinct-human-celltypes-1?commentId=2263214%3AComment%3A10331
EYE ANATOMY

Eyelids (L):
Protection against particles and
light
 Help spread tears over surface of
eye- moist & comfort


Eyelashes (L):

Filter out foreign matter
http://www.medical-look.com/human_anatomy/organs/Eyelids_and_eyelashes.html
EYE ANATOMY

Sclera (S):
“White of the eye”
 Tough, opaque tissue that
extends around the eye
 Attached to the extraocular
muscles

http://www.thirdeyehealth.com/sclera.html
EYE ANATOMY

Extraocular Muscles
Help move the eye left, right,
up, down and diagonally
 These 6 muscles are:

Superior rectus
 Inferior rectus
 Medial rectus
 Lateral rectus
 Inferior oblique
 Superior oblique

http://media.photobucket.com/image/introduction%20to%20eye%20anatomy/trimurtulu/Eye.jpg
EYE ANATOMY

Cornea (K):
Clear tissue infront of the
Irisi
 Function:



Focus light as it enters eye
Avascular

Only organ that has no blood
vessels
http://commons.wikimedia.org/wiki/File:Cornea.jpg
EYE ANATOMY

Pupil (P):


Central opening of iris
Iris (I):
Ring shaped tissue
 Colored part of eye
 Controls the amount of light
that enters the eye


Two muscle fibers:

Contraction


http://www.bioconsulting.com/Bio_Tech_Assessment.html
Constricts pupil in bright light
Dilation

Dilates pupil in dark
http://www.goodhope.org.uk/departments/eyedept/angleclosureetc.htm
EYE ANATOMY

Crystalline Lens:



Clear, flexible structure
Behind the iris & pupil
The lens & ciliary body
help control fine focusing of
light as it passes through
the eye
http://www.smartplanet.com/business/blog/smart-takes/artificial-lens-implant-to-givepatients-high-definition-vision-better-than-2020/2558/
EYE ANATOMY

Vitreous Chamber:
Located behind the lens &
in front of the retina
 Filled with a gel-like fluid
called the vitreous humor
 The vitreous help maintain
the shape of the eye

http://www.ophthobook.com/questions/question-how-many-chambers-are-there-in-the-eye
EYE ANATOMY

Retina:

Acts like the film in a camera to
create an image
hhttp://www1.appstate.edu/~kms/classes/psy3203/EyePhysio/human_retina.htm
http://www.answersingenesis.org/tj/v13/i1/retina.asp
EYE ANATOMY

Retina:
Acts like the film in a camera to
create an image
 Converts light signals into nerve
signal then send these signals to the
optic nerve


Optic nerve carries the signals to the
brain
hhttp://www1.appstate.edu/~kms/classes/psy3203/EyePhysio/human_retina.htm
http://www.answersingenesis.org/tj/v13/i1/retina.asp
EYE ANATOMY

Retina:
Acts like the film in a camera to
create an image
 Converts light signals into nerve
signal then send these signals to the
optic nerve


Optic nerve carries the signals to the
brain
hhttp://www1.appstate.edu/~kms/classes/psy3203/EyePhysio/human_retina.htm
Rods- low light situations
 Cones- allows you to see color

http://www.answersingenesis.org/tj/v13/i1/retina.asp
EYE ANATOMY

Optic Nerve
A bundle of 1 million nerve
fibers
 Responsible for transmitting
nerve signals from the eye to
the brain
 The optic disc is the front
surface of the optic nerve


http://cssd.us/body.cfm?id=802
The optic disc is visible on the
retina
http://www.wollongong.youronlinecommunity.com.au/wollongong-online/2008/50/walkthrulife/eyehealth.html
EYE ANATOMY

Macula
Located in the central part
of the retina
 Responsible for giving
sharp central vision
 Used for reading,
recognizing faces, and
watching TV

http://www.dukehealth.org/eye_center/specialties/macular_degeneration/care_guides/macular_dege
neration_frequently_asked_questions
OPTIC CHIASM
The X-Shaped
space infront of
the pituitary gland
where the optic
nerves cross the
brain