Slides in this set
Cornea refracts light into the eye
Iris - controls amount of light entering
Optic Nerve- carries impulses from the
receptors to the brain
Blind spot contains no light receptors
Retina- contains light receptors
Lens- focuses the light onto the retina…read more
-Focusing on near and distant objects
*Ciliary muscles contract, suspensory ligaments
slacken and lens becomes fat.
*Ciliary muscles relax, suspensory ligaments tighten
and lens goes thin.…read more
*Are unable to focus on near objects; the images are
focused behind the retina.
*Corrected by convex lenses.
*Are unable to focus on distant objects; the images
are focused in front of the retina.
*Corrected by concave lenses.…read more
Binocular and monocular vision
*Binocular vision- two eyes which work together, humans
and some animals have this
- Good for judging distances
- Good for judging speed(handy for catching prey)
*Monocular Vision- one eye on each side of the head
- Wider field of view
- Can't easily judge depth or speed
- The organisms are more likely to notice predators…read more