Euphrasia
This plant is native to the Eurasian continent, and it is possible to find multiple varieties that grow both in the plains as well as more than 3,000 m high.
It is possible to find some species in the American continent, where they usually grow close to other plants parasitizing by their roots, which absorb the sap of nearby plants.
He prefers meadows and sunny places.
Euphrasia is an annual plant, with a reddish and erect stem that does not reach more than 35 cm in height.  Its leaves are opposite, pinnatisect, sessile, jagged margin and gray-green are arranged in opposite pairs.
The flowers have been arranged in the upper part of the stem, being these bell-shaped, axillary and of varied colors that go from white, through yellow to violet.
The fruit is an elongated and flat pod that has numerous seeds that are thrown once the mature plant.
Internally:
Due to its qualities as tonic and astringent, its decoction is frequently used to treat problems such as diarrhea or bleeding.
As a sedative:
One of its main properties is its sedative quality, which is why the infusion of this plant is used to combat conjunctivitis and other vision problems.  To prepare the infusion it is necessary to take 15 grams of the dried plant, be it the flowers, the hours and the branches, place them in a cup, fill with boiling water, cover the cup and let it cool.  Once the infusion is cold, it can be applied directly to the eyes with a dropper (dropper) or a damp handkerchief, this relieves from conjunctivitis to eye pain caused by exertion.  Dermatological and digestive benefits.