Detect
Stimulus /Stimuli
Sensory cells
Sense organs
Orbit
Eyebrow
Protective coat
Iris
Eyelid
Eyelash
Pupil
Cornea
Retina
Lens
Optic nerve
Contract
Relax
Light-sensitive cells
Telescope
Inverted image
Distant object
Binocular
Microscope
Skull
Blind spot
Upright
Cones
Rods
focusing muscles
colour images
black and white images
protective coat
thicker
thickness
Astronomical telecope
Electron microscope
Hand lens
message
brain
protect
interpret