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.
Ask Your Doctor. You can also get this information from your doctor or from a licensed optician. If you have two PD numbers on your prescription, you have either been given both the Distance/Reading or Right Eye/Left Eye. Here's what you do: Two same number: (Ex. 30/30) Add them together (Ex. 60 is your PD). Two low numbers*: (ex. 30/31) The first number is for the right eye (O.D.) and the second number is for the left eye (O.S.). *Place it in the Customer notes section of the order form. Two high numbers: (Ex. 62/59) First number is your Distance PD and the second is your Near PD (for reading-only glasses). As a Guideline: Most adults' PD's are between 55-65. Most kids' PD's are between 42-54.