They answered, that each of them was a perfect eye, by reason they perceived that each was covered with a transparent cornea, containing a liquor within them, which resembled the watery or glassy humour of the eye. To which the Empress replied, that they might be glassy pearls, and yet not eyes; and that perhaps their microscopes did not truly inform them. But they smilingly answered her Majesty, that she did not know the virtue of those microscopes; for they never delude, but rectify and inform the senses; nay, the world, said they, would be but blind without them, as it has been in former ages before those microscopes were invented.