criticalangle		part of our vision which we cannot see things
opaque		image appears to diverge
convexlens		buldging out shape
luminous		controls the size of the pupil
reflectedlight		sensitive to low light
translucent		the point where the convergent rays meet
angleofrefraction		the angle formed by a reflected ray
blindspot		the angle formed by a incident ray
opticalnerve		the hole in the middle of the eye that lets light pass through
primarycolour		mostly covered in rods and cones
lens		cyan, magenta and yellow
focalpoint		a cell on the retina provides sharp focus and enables us to see colour
iris		hollowed out shape
cornea		light from the sun
retina		the transparent curved 'window' covering the eye
cone		smallest angle of incidence
angleofincidence		does not let light through
indicentlight		the cone system on the retina is faulty
whitelight		ben light when passed through an object
concavelens		the image that can be seen on the screen
virtualimage		the light that bounces off a surface
pupil		produces light
angleofrefraction		red, blue and green light
transparent		produces light when heated
luminescent		a carefully curved transparent object
totalinternalreflection		lets some light through
normal		finds the angles of incidence and reflection
opticalcentre		the angle formed by a refracted ray
colourblindness		produces light in a chemical reaction
realimage		transmits visual images to the brain in eletric signals
incandesecent		also known as the pole
secondarylight		light strikes a medium boundary at an angle larger than the critical angle
refractedlight		lets most light through
rod		the direct light falls on a surface