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Senses (gross and microscopic anatomy of the eye Eye (Anterior segment…
Senses
gross and microscopic anatomy of the eye
Fibrous Layer - Sclera
Dense Connective Tissue
Protective
Anchor for muscle
Give shape
Cornea
Transparent
Window allows light into the eye
Helps to focus light
Vascular layer- Choroid
Black
Nourishes other lunic
Absrbs light prevent light from scattering
Continues with the ciliary body
Muscle
Change the shape of the lens
Inner layer - retina
Tan
Coverage
To become optic nerve
Contains photoreceptors
Axons from receptors
Rods
Indian light
more than cones
sensative to light
light and darkness
Cones
Color
best in bright light
Lens
Posterior to light
Function- to focus light on retina
Iris
posterior to cornea
Function- dilate or constrict to allow more and lets light into the eye
Pupil
opening
Optic disc
axons coverage to form optic nerve
no photoreceptors
"Blind spot"
Macula lutea
Posterior poles
Only cones
Place of sharpest vision
Fovea centralis
cent of macula lutea
Posterior segment
Filled with vitreas humur
Vascus liquid
Function- Transmit light
Support retina and lens
Maintains normal pressure shape
Anterior segment
Filled with aqueas humur
Viscus fluid
Nourishes
lens
cornea
Transmit light
Maintains normal pressure and shape
Anterior to posterior segment
cornea
Posterior chamber
Anterior segment
Iris
Anterior chamber
Iris
Cornea
sensory receptors based on type of stimulus.
Thermoreceptor
Cold
Warm
Temperature
Photoreceptor
light
Chemoreceptor
Chemicals
Ex: chemicals in the air, blood vessels
Nociceptor
Pain
anxious(pain)
Danger
Mechnoreceptor
Barreceptor
sensitive to blood pressure
Touch
Vibration
Stretch
Pressure
sensory receptors based on stimulus origin.
Exteroreceptor
Stimulus from the environmnet
Location: skin and special sense
Introreceptors
Stimulus from the interior body
Internal organs
Proprioceptors
Sensitive to the stimulus fro muscle,tendons and ligament joints
