Eye surgery and lower the risk of infection. These precautions include the use of antiseptics, such as povidone-iodine, and sterile drapes, gowns and gloves. Although the terms laser eye surgery and refractive surgery are commonly used as if they were interchangeable, this is not the case. Lasers may be used to treat nonrefractive conditions (e.g. to seal a retinal tear). Laser eye surgery or laser corneal surgery is a medical procedure that uses a laser to reshape the surface of the eye. This is done to correct myopia (short-sightedness), hypermetropia (long sightedness) and astigmatism (uneven curvature of the eye's surface). It is
Archaic humans In this case the standard taxonomy is used, i.e. "Homo rhodesiensis", or "Homo neanderthalensis". The evolutionary dividing lines that separate modern humans from archaic humans and archaic humans from "Homo erectus" are unclear. The earliest known fossils of anatomically modern humans such as the Omo remains from 195,000 years ago, "Homo sapiens idaltu" from 160,000 years ago, and Qafzeh remains from 90,000 years ago are recognizably modern humans. However, these early modern humans do possess a number of archaic traits, such as moderate, but not prominent, brow ridges. The emergence of archaic humans is sometimes used as an example of