The word Chamomile comes from the Greek meaning ground apple, probably because of its apple-like fragrance. The Romans used Chamomile for incense. Roman Chamomile gained its name, not from ancient Rome, but because a 19th century plant collector found some growing on the ruins of the coliseum in Rome.
What Is Perfect Vision? In cases of normal vision, also called perfect vision or 20/20 vision, the eye is able to focus light from objects precisely on the retina at the back of the eye. Refractive errors occur when the eye is unable to properly focus light on the retina.
No. 15/15 vision means normal sharpness of vision at 15 feet, just as 20/20 indicates normal sharpness of vision at 20 feet. For consistency, optometrists in the United States use 20 feet as the standard for measuring sharpness of vision. Other countries express visual acuity in their own way. In England, for example, optometrists express visual acuity in meters (6/6 is considered normal).