The Plague of Misidentification
Vision & the Electromagnetic Spectrum an Introduction
In today's TPOM, we will look at vision through the lens of the anatomy of the human eye. Why? If you want to understand reality, you had better know as much about your sense organs, sensation, perception, brain functions and anatomy as humanly possible.
The Human Eye
The human eye is a complex and fascinating sense organ. It is designed to transform light waves within the 400 and 700 nm electromagnetic spectrum. The human eye is responsible for roughly 80% of all information received by the human brain. It is nearly spherical, though it is not a perfect sphere. Surprisingly, eyes come in many shapes and sizes. The shape of your eye can determine what types of eye issues you may experience. If the eye deforms even slightly, it can cause focal or focus issues, resulting in near and farsightedness, for example. The average human eye is about 0.9 in. (24mm) in diameter, and as mentioned above, it is not perfectly spherical but is slightly flattened near the front and back.
The eye consists of three layers. They are as follows:
The sclera - the tough white fibrous outer envelope of tissue covering all of the eyeball except the cornea.
The uveal or choroid - the vascular tunic of the eye; the iris, ciliary body, and choroid taken collectively, also called tunica uvea and uveal tract.
Retina - from the Latin word rete (net). A layer at the back of the eyeball of vertebrates containing light-sensitive cells (rods and cones) which trigger nerve impulses that pass via the optic nerve to the brain, where a visual image is formed.