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Anatomy of the Human Eye, Nearby object, Far away object - Coggle Diagram
Anatomy of the Human Eye
optic nerve
takes the stimulus to the receptors
Accomodation of
lens
the power of the eye to see far away or nearby objects
Nearby objects
The
lens
diverge. It gets thicker
ciliary muscles and the suspensory ligaments
Far away objects
The
lens
gets thinner
So that the light is formed on the retina to form an image
Short sightedness →myopia
Long sidghtedness →hyperopia
outer layers
sclera
first layer
Cornea
extension of sclera in the front region of the eye
protection
choroid
second layer
absorbs light
rich with blood capilliers and the nourshinemnt of the eye is provude tby the chlrioid layer
it doesn't allow refraction of the light
iris
retina
third layer
sensory cells
cones
color vision
longer
rods
smaller
black and white vision
the
colored image
is form here
fluid between the lens and pupil
aquoues humor
semi-solid vitreous humor
Iris
extension of the choroid which partially covers the lense
leaves a gap called pupil
opening through which light enters
bright light
circular muscles contract
radial muscles relax
the pupil becomes narrower
dim light
circular muscles relax
radial muscles contract
the pupil becomes broader
yellow spot of fovea
maximum amount of cones
making the image
blind spot
region of the retina from which the optimum nerve arises
circular and radial muscles
antagonistic muscles
act opposite to each other. e.g. biceps and triceps
conjunctiva
a thin, transparent membrane in the front of the eye
tear glands
secrets LYSOZYME (enzyme)
kills the germs
tear duct
doesn't allow any foreign substances that might enter in the eye
Nearby object
lens become thicker/slackened
suspensory ligaments are loosened when the lens become thicker
ciliary muscles contract
Far away object
lens become thinner
suspensory ligaments get tightened when the lens become thinner
ciliary muscles contract