Beginning Iridology Guide - Weebly

D. Basement membrane consisting of strong connective tissue, which forms the
support and innermost layer of the iris.
E. The pigment layer consists of two rows of epithelial cells of a dark purple
color, which rest on the uneven surface of the basement membrane of the iris. This
pigment layer serves to prevent the penetration of light through the iris into the inner
dark chamber of the eyeball.
The Normal Colors of the Iris
As described in Chapter IV, there are only two normal iris colors,--light azure blue
and light hazel brown.
I. The stroma of the blue iris is devoid of pigment, thus allowing the purple pigment
layer to shimmer through as a uniform, clear sky blue.
II. In the normal brown iris the connective tissue cells of the stroma contain a brown
pigment which totally obscures the purple pigment layer, thus imparting a uniform,
clear light brown color to the iris.
The albino iris contains no pigment either in the connective tissue cells of the
stroma or in the pigment layer. The resulting transparency renders the blood vessels
visible, hence the iris presents a delicate pink appearance.
For the sake of avoiding confusion we will henceforth consider only the Indo-
Caucasian iris which is normally of a uniform brilliant azure color.
The Blood Supply of the Iris
The long and short ciliary blood vessels form a complete ring around the peripheral
border of the iris.
Fig. 3. Blood Supply to Iris.