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Senses (gross and microscopic anatomy of the eye (inner layer- lens (very…
Senses
gross and microscopic anatomy of the eye
fibrous layer
sclera
white desnse connective tissue gives shape to eye
cornea
bulges out a little bit, it is transparent and allows light in helps focus light on retina
cillary body
continuous with corotoid, smooth muscle. It changes the shape of the lens to help focus on near object
vascular layer- chroid
black absorbs light and prevents it from scattering
nourishes the layer especially the retina
inner layer- lens
very thin
photorecptor location
axons from retina converge to from optic nerve
smooth sphincter muscle
dilate/constrict pupil to allow more or less light to outer eye
rods
most abundant amount of photoreceptor, sensitive to light
cones
sensetive to color, good in low light situation
optic disc
no photorecptor- blind spot
macula lutea
posterior pole, center of macula lutea is fovea cerntralis
fovea centeralis
light focuses here is the clearest vision, only cones (color vision)
posterior segment
filled with viterous humor, thick liquid. It supports retina and lens also maintains pressure in eye
anterior segment
aqueous humor, watery maintns the pressure of the eye. Nourishes the lens and the cornea.
sensory receptor based on stimuli
thermoreceptor-temperature
chemorecptor -chemicals
nociceptor- pain
mechanoreceptor-touch, pressure, vibration
baroreceptors -specialized mechanoreceptor
sensory receptors based on type of stimulus
exteroceptor
sensitive to stimulus from environment
interoceptors
sensitive to pain from internal agents
proprioceptor
sensetive to pain based from muscle tendon, ligament, joint sterch
Ali Mohamed
MWF 10-10:50