CRAB's Eyes, in Pharmacy, are a strong concretion in the head of the crab-fish. They are rounded on one side, and depressed and sinuated on the other, considerably heavy, moderately hard, and without smell. We have them from Holland, Muscovy, Poland, Denmark, Sweden, and many other places. What are usually met with in the shops are prepared by art.
Crab's eyes are much used both in the shop medicines and extemporaneous prescription, being accounted absorbent.