Fumaric acid or trans-butenedioic acid is the chemical compound with the formula HO 2 CCH=CHCO 2 H. This white crystalline compound is one of two isomeric unsaturated dicarboxylic acids, the other being maleic acid.umaric acid has been used a food acidulant since 1946. It is approved for use as a food additive in the EU, USA and Australia and New Zealand. As a food additive, it is used as an acidity regulator and can be denoted by the E number E297.
eye doctor, ophthalmologist, optician, optometrist (see synonym study at the current entry) Synonyms. The term eye doctor refers generally to an ophthalmologist, but is also used informally (and imprecisely) in referring to an optometrist. An ophthalmologist is a physician who specializes in the diagnosis and treatment of diseases of the eye.
Optometry and Optometrists. Optometry is a vision care specialty that is concerned with the health of the eyes, the visual system, and related structures. An optometrist is a health care professional who specializes in function and disorders of the eye, detection of eye disease, and some types of eye disease management. An optometrist conducts eye examinations, prescribes corrective contact lenses and glasses, and diagnoses and treats eye diseases and disorders.