Fig. 5—Picking up the choroid with the point of the scissors.
Fig. 6—A. Hyaloid, vitreous, and lens ready to drop out of the eyeball.
Fig. 7—Photograph of dissected hyaloid membrane (A), with pigmented indentations of the ciliary processes, the suspensory ligament (B), and the crystalline lens in its capsule (C). ([Page 34].)
Many times a considerable amount of pigment from the second tunic will remain attached to the processus zonuloe. This pigment may be easily removed by scraping it off with the sharp edge of the scalpel or by brushing it off with a soft, wet tooth-brush.
It is unwise to use alcohol as a preservative because it produces an almost immediate opaqueness and hardness which spoils the specimen for further study.
This description may give the impression that the dissection is a lengthy one; however, it can be done by an expert in two or three minutes; by a beginner in five or six minutes.
For purposes of demonstration or study the specimen should be placed in a small bottle or a vial containing a 5 per cent. solution of formaldehyde. It can then be examined with hand lens or microscope. ([Fig. 7].)