The Senses Flashcards
Schlera
Preserves the shape of the eye
Choroid
Pigmented to prevent reflection of light within the eye
Contains many blood vessels
Retina
Contains rods and cones (light receptors)
Fovea
Yellow Spot
Place of acute visions
Has most receptors
Cornea
Transparent to allow light through
Ciliary body/muscle
Alters the shape of the lens
Lens
Transparent
Provides fine adjustment for focusing light on the retina
Aqueous humour
Fluid
Gives shape
Vitreous humour
Jelly-like
Gives shape
Iris
Controls the amount of light entering the eye
Makes pupils dilate or constrict
Pupil
A hole
Allows light in the lens
Can shape its size
Blind spot
Has no rods or cones
Suspensory ligament
Holds lens in place
Conjunctiva
Protective membrane
Rods and Cones
Sensory nerve cells
Found in retina
Rods
Light light intensity
Black and white
Cones
High light intensity
Colour
Accommodation
The ability of the lens to change its shape to form a clear image
Glue Ear
Cause: Too much fluid collecting in middle ear
Symptoms: loss of Hearing
Corrective Measures: Grommets in eardrum
