Professional Qualification
Most practitioners of VT are members of either the Optometric Extension Program Foundation (OEPF website) or the College of Optometrists in Vision Development (COVD website).
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Famous quotes containing the word professional:
“Three words that still have meaning, that I think we can apply to all professional writing, are discovery, originality, invention. The professional writer discovers some aspect of the world and invents out of the speech of his time some particularly apt and original way of putting it down on paper.”
—John Dos Passos (1896–1970)