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.
In case of severe injury of an eye, especially through the lodgment of a foreign body in it, causing inflammation and destruction of the sight, there is great danger that the other eye will become affected through sympathy. This danger is so great that it is generally considered best to remove the injured eye by a process known as enucleation of the eyeball. The deformity arising from the operation is easily concealed by means of an artificial eye. Artificial eyes are now made to resemble the genuine in appearance so closely as to be distinguishable only by a close examination. Artificial eyes consist of thin porcelain plates properly curved and colored.