(Euphrasia officinalis)
Euphrasia officinalis refers to a vast genus containing over 450 species.
European wild plants grow in meadows, pastures, and grassy places in Bulgaria,
Hungary, and the former Yugoslavia. Eyebright is also grown commercially in
Europe. The plant flowers in late summer and autumn. The whole herb is used in
commercial preparations.
Historical or traditional use (may or may not
be supported by scientific studies): Eyebright was and continues to be used
primarily as a poultice for the topical treatment of eye inflammations,
including blepharitis, conjunctivitis, and sties.
A compress made from
a decoction of eyebright can give rapid relief from redness, swelling, and
visual disturbances in acute and subacute eye infections. A tea is
usually given internally along with the topical treatment.
It has also
been used for the treatment of eye fatigue and disturbances of vision. In
addition, herbalists have recommended eyebright for problems of the respiratory
tract, including sinus infections, coughs, and sore throat.
Eyebright is
high in iridoid glycosides, flavonoids, and tannins. The plant has astringent
properties that probably account for its usefulness as a topical treatment for
inflammatory states and its ability to reduce mucous
drainage.
Traditional herbal texts recommend a compress made with 15
grams of the dried herb combined with 500 ml (2 cups) of water and boiled for
ten minutes. The undiluted liquid is used as a compress after cooling. This was
commonly combined with antimicrobial herbs, such as goldenseal.
The
German Commission E monograph on eyebright does not support this application,
due to possible impurities in non-pharmaceutical preparations. Consult with a
physician knowledgeable in the use of herbs before applying eyebright to the
eyes.
Internally, eyebright tea, made using the same formula above, can
be drunk in the amount of two to three cups per day. Dried herb, as 24
grams three times per day, may be taken. The tincture is typically taken in
26 ml three times per day.
Due to limited information on the
active constituents in eyebright and the need for sterility in substances used
topically in the eyes, the traditional use of eyebright as a topical compress
currently cannot be recommended without professional support.
Used
internally at the amounts listed above, eyebright is generally safe. However,
its safety during pregnancy and lactation has not been proven.
Eyebright
takes part of it's nourishment from other plants' roots, especially grass. This
means that it cannot be planted alone, and be expected to do
well.
Eyebright is rarely cultivated, but it can be done. It has
differences in appearance, and will be only an inch or two tall in cooler
areas, but when it grows in a hot grassy area, will turn into a small bush
about 10 inches tall.
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