Salaries. The U.S. Bureau of Labor Statistics provides salary data for both optometrists and physicians. According to its May 2011 figures, the average income for optometrists was $107,720 per year. That same figure, for physicians and surgeons, was $184,650.
In phonetics, a vowel is a sound in spoken language, with two competing definitions. In the more common phonetic definition, a vowel is a sound pronounced with an open vocal tract, so that the tongue does not touch the lips, teeth, or roof of the mouth, such as the English ah /ÉË/ or oh /oÊ/. There is no build-up of air pressure at any point above the glottis.
A vowel is a type of sound for which there is no closure of the throat or mouth at any point where vocalization occurs. Vowels can be contrasted with consonants, which are sounds for which there are one or more points where air is stopped. In nearly all languages, words must contain at least one vowel. While a word can be formed without any consonants â such as the English words I or way â no word may consist of only consonants, without a vowel. In English, there are five letters which always represent a vowel when written: a, e, i, o, and u.