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.
Optometrists and ophthalmologists. When it comes to health professionals who look after your eyes, there are different specialists who may see you. Optometrists. In the high street, the person you may think of as an optician or ophthalmic optician who you go to for eye tests and glasses is more accurately called an optometrist. Like your GP for general health, optometrists are on the front line of eye health care, called primary care.