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level: Level 1

Questions and Answers List

level questions: Level 1

Question	Answer
fine tunes the focus of the light rays onto the fovea of the retina for clear vision	lens
coloured portion of the eye- fucntion is to regulate the amount of light coming into the eye	iris
the hole in the centre of the eye where light enters	pupil
a type of light sensitive cell in the retina of the eye that provides side vision and the ability to see in deem light	rod
a type of light senstive cell in the retina of the eye that provides colour vision and sharpe central vision	cone
by cornea and lens involved bending light rays to focus an image on the central fovea	reflection
changing the shape of the lens to allow sharp focusing of light onto the retina	accomodation
the smooth muscle of the iris that controls the amount of light entering the eye and helps prevent scattering of light	pupil constriction/ dilation
medial movement of the eyes to keep both focusing on an object	convergence of the eyes
occipital	what is the primary visual and visual association area
photoreceptors	what are the receptors involved
a protective bacterial enzyme that protects, cleans and lubricates the eyeball	lysozyme
1. lacrimal gland 2. lacrimal ducts to canal 3. lacrimal sac 4. nasal crimal duct 5. nasal cavity	flow of tears
the outter layer of the eye	fibrous tunicn
the transparent layer that cover the iris 'window' into the eye	cornea
the white of the eye, provides shape and support to the eye	sclera
middle layer of the eye	vasular tunic
is highly vascular, blood vessels provide nutrients to the eye	choroid
contains ciliary muscle that has smooth muscles that alter the shape and lens which is essential for focus	ciliary body
a layer at the back of the eyeball that contains cells sensitive to light, which trigger nerve impulses that pass via the optic nerve to the brain, where a visual image is formed.	retina