There are numerous descriptive terms for Horus' eye
in the Pyramid Texts and what appear to be a large
number of names as well.

I've thought I've known what this eye is and the names
for some time but have not stated it because I failed
to grasp the basic concept of what Horus is. It was
caused by viewing this in a vacuum and being confused
by believing Horus was a single entity rather than two.

Horus apparently was originally the spirit which was the
land of the horizon. This was the land above the Nile
Valley where the horizon was visible. But this was a
specific and well defined area that extended from the
South Fayuum to Giza (or Abu Rawash) and west to what
was probably the oldest course of the Nile. This tri-
angular section was a part of Geb and Horus was its spi-
rit. This Horus was a god and was credited with the ab-
ility of this area to be lush despite being in a desert.
Horus was the water coming up through the Earth in fissures
and oozing up though cracks.

But Horus was also a dead king resurrected as the child
of Isis and featured in legend. He was the spirit of this
lush region personified and redeified.

There are dozens of names in the PT but these are in just
the first few pages (and some from memory)

Dried
Sweet
Hard
White
Green
Black
Red
Upper
Lower

These are distinct eyes rather than pet names for the same
eye ripped out by Set.

These eyes had many remarkable attributes as well

Water circulated behind them.
They have an odor.
They were swallowed by various entities. (mostly Gods)
They can drip on the tufts of plants.
They breathe!!!
Osiris' body is full of one that he might live.
They were sealed up.

These eyes are the holes through which water flowed up. They
were drilled into the larger fissures which often resulted in
cold water geysers powered by the yeast gas which was the ef-
flux of Osiris. Natron was added as necessary. Lower eyes
were topped by a djed or the sandals of Osiris so that the wat-
er might be aimed and controlled to fill the upper eye of Horus
on the platform above. If this aim were bad the platform might
be destroyed and the "eye swallowed" and then the "bridge girder-
ers of the desert" would have no use for the boat made by Khnum.

____________
Man fears the pyramid, time fears man.