This section is from the book "The Home Hand-Book of Domestic Hygiene and Rational Medicine. Volume 2.", by J. H. Kellogg, M.D.. Also available from Amazon: The Home Hand-Book of Domestic Hygiene and Rational Medicine, Volume 2.
This is an affection of the eye which frequently arises in consequence of chronic inflammation or congestion of the conjunctiva, although it may also originate independent of any inflammation. It consists of an enlargement of the blood-vessels of the mucous membrane of the eyeball, and appears as a red triangle, the apex of which appears at the edge of the cornea, or encroaches upon it, while the base is at one comer of the eye. It often stops when it reaches the edge of the cornea, but sometimes extends to the center of the pupil, though never going beyond this point
The disease does not affect the sight, and does no harm, except as a blemish, unless it encroaches upon the pupil. When small, it may frequently be caused to disappear by applying to the eye an alum wash, a teaspoonful to the pint of water, three or four times a week. When the growth is very large, however, so that it interferes with the sight, it should be removed by a surgical operation, which can only be performed by a competent surgeon.