52. The outermost layer of the eyeball is colored
and is made up of very
dense
; it is known as the
. Its anterior portion is called the
.
The major focusing device for the eyeball is the
.
53. The middle layer of the wall of the eyeball is known as the
.
This layer is richly supplied with
and pigmented with a ______ material.
54. The inner layer of the wall of the eyeball is known as the
.
The actual photoreceptor elements are located at the
and the
s.
These elements are the
s and the
s.
55. The elements which register colors are the
. However,
require
more intense light than do
. Rods register only
.
56.
What are the fovea centralis and macula lutea?
.
57.
What is the blind spot?
.
58.
The thickening of the choroid layer around the edge of the lens is called the
. It includes radial muscle fibers making up the
muscle.
59.
Describe the lens and the process of accommodation.
60. The space between the cornea and the iris is called the
.
The space between the iris and the lens is called the
. Together,
these make up the space between the cornea and the lens, called the ______ _______
and filled with the
. This drains into the encircling
,
located in the angle between the
and the
. Behind the lens is a
jellylike material called the
. It fills the
cavity of the eyeball.
MD0006
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