where does the eye for an eye come from
Eye for an eye First referenced in the Code of Hammurabi, (which predates the Hebrew bible.) In the Hebrew Law, the "eye for eye" was to restrict compensation to the value of the loss. Thus, it might be better read 'only one eye for one eye'.[3] The biblical phrase "an eye for an eye" in Exodus and Leviticus (עין תחת עין‬, ayin tachat ayin) literally means 'an eye in place of an eye' while a slightly different phrase (עַיִן בְּעַיִן שֵׁן בְּשֵׁן, literally "eye for an eye; tooth for a tooth") is used in another passage (in Deuteronomy) of the Hebrew Bible, specifically, in the first of its three subdivisions, the Torah.[9][10][11] For example, a passage in Leviticus states, "And a man who injures his countryman – as he has done, so it shall be done to him [namely,] fracture for fracture, eye for eye, tooth for tooth. Just as he has injured a person, so it shall be done to him." (Lev. 24:19–21)[9]
Iris (anatomy) The stroma connects to a sphincter muscle (sphincter pupillae), which contracts the pupil in a circular motion, and a set of dilator muscles (dilator pupillae) which pull the iris radially to enlarge the pupil, pulling it in folds. The back surface is covered by a heavily pigmented epithelial layer that is two cells thick (the iris pigment epithelium), but the front surface has no epithelium. This anterior surface projects as the dilator muscles. The high pigment content blocks light from passing through the iris to the retina, restricting it to the pupil.[1] The outer edge of the iris, known as the root, is attached to the sclera and the anterior ciliary body. The iris and ciliary body together are known as the anterior uvea. Just in front of the root of the iris is the region referred to as the trabecular meshwork, through which the aqueous humour constantly drains out of the eye, with the result that diseases of the iris often have important effects on intraocular pressure and indirectly on vision. The iris along with the anterior ciliary body provide a secondary pathway for aqueous humour to drain from the eye.