Chisholm has seen a case in which for five weeks a fly was imbedded in the culdesac between the lower lid and the eyeball.
Foreign bodies are sometimes contained in the eyeball for many years.
There is an instance on record in which a wooden splinter, five mm.
long and two mm.

broad, remained in the eye forty-seven years.

It was extracted, with the lens in which it was lodged, to relieve pain and other distressing symptoms.

Snell reports a case in which a piece of steel was imbedded and encapsulated in the ciliary process twenty-nine years without producing sympathetic irritation of its fellow, but causing such pain as to warrant enucleation of this eye.

Gunning speaks of a piece of thorn 5/8 inch long, imbedded in the left eyeball of an old man for six years, causing total loss of vision; he adds that, after its removal, some improvement was noticed.
Williams mentions a stone-cutter whose left eye was put out by a piece of stone.