Eye Flashcards
What is the conjunctiva?
A thin membrane protecting the eye
What is the pupil?
A “black hole” that lets light in
What is the iris?
A coloured thing that controls the amount of light let into the eye
What are the ciliary muscles?
Muscles controlling the thickness and curvature of the eye
What is the cornea?
Bends light to form an image and is also there for protection.
What is the lens?
The big thing behind the pupil that fine tunes the image. (Tallula I thinks it’s the thing that we spent ages trying to cut.😂)
What is the vitreous humour?
A stiff jelly that supports the back of the eye. Makes up the inside of the eye ball
What is the suspension ligament?
The ligament that supports and suspends the lens
What is the retina?
The back of the eye that contains rods and cones
What’s the choroid?
The bit behind the retina that contains a good blood supply and melanin which absorbs light to avoid internal reflection and glare
What is the blind spot?
A part with no receptors present
What is the optic nerve?
It contains the sensory neurones linking the retina to the midbrain
What is the sclera?
The bit behind the choroid. It is tough and fibrous to prefect the eye
What is a fovea? (Yellow spot)
Contains only come cells. Most sensitive part of the retina for colour vision
What does the eye do to focus on near objects?
Ciliary muscles contract which slackens the suspension ligament
Muscle tension on the lens is lower
Lens becomes fatter and more curved allowing light to refract more.
