26. Transmission
Light quanta of certain
wavelengths are
scattered by the
molecules they hit
Why is this important for vision?
This is how our eyes focus.
27. Absorption
Light quanta are taken
up by a substance
converted to other
types of energy
Why is this important for vision?
This is how we convert light into neural signals
28. What is luminance?
A photometric measure of the energy
Measured in candelas per square meter of surface
45. Accommodation
In a relaxed eye, parallel
rays from a distant object
fall into focus on the retina.
Diverging rays from a
nearer object will fall into
focus behind the retina.
In this case, muscles in
the eye change the shape of
the lens to maintain focus
on the retina.
46. (I play a part of video which reinforces how the structure
of the eye supports the function of the eye)
47. Why do the eyes move?
Lots of reasons ...
Spatial resolution
Binocular registration
49. Binocular Registration
Since the eyes are a short distance apart in the head,
they have to make vergence movements to maintain
binocular fixation
Useful in depth perception
50. Summary
The structure of the eye supports the
function of the eye.
Eye movements serve to maintain high
resolution and binocular fixation.