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Euphrasia, or eyebright, is a genus of about 215 species of herbaceous flowering plants in the family Orobanchaceae (formerly included in the Scrophulariaceae), with a cosmopolitan distribution. They are hemiparasitic on grasses and other plants.
Euphrasia stricta, the drug eyebright, is an annual forb in the genus Euphrasia. [1]It has been introduced in northeastern North America, where it is found in New England (except Connecticut), New York, Pennsylvania, Nova Scotia, New Brunswick, Prince Edward Island, Ontario, Quebec, the upper peninsula of Michigan, northern Wisconsin, Minnesota and Illinois. [2]
Euphrasia vigursii, also known by its common names of Vigur's eyebright [3] or Cornish eyebright, [4] is an endangered annual of the eyebright family which is endemic to Devon and Cornwall. [ 5 ] [ 6 ] [ 7 ] It is a facultative hemiparasite and needs open conditions and regular grazing of larger shrubs and grasses to grow.
Printable version; In other projects Wikidata item ... Common eyebright is a common name for several plants in the genus Euphrasia and may refer to: Euphrasia ...
An eye chart is a chart used to measure visual acuity comprising lines of optotypes in ranges of sizes. Optotypes are the letters or symbols shown on an eye chart. [ 1 ] Eye charts are often used by health care professionals, such as optometrists , physicians and nurses , to screen persons for vision impairment .
Visual acuity with Distant chart with correctors Visual acuity with eye chart at Distant 20 feet (6 m) and with (cc: Latin cum correctore) correctors (spectacles); Dsc is without (sc: Latin sine correctore) correctors. See Visual_acuity#Legal_definitions: VA Nsc - VA Ncc Visual acuity with Near chart without correctors
Euphrasia cambrica, commonly called the Welsh eyebright, [1] is a plant from the genus Euphrasia, in the family Orobanchaceae. It is endemic to North Wales where it occurs on mountains in the vice-counties of Caernarfonshire and Merionethshire .
Eyebright was used for eye infections, owing to the supposed resemblance of its flower to an eye. The doctrine of signatures , dating from the time of Dioscorides and Galen , states that herbs resembling various parts of the body can be used by herbalists to treat ailments of those body parts.