By far the most frequent form of cystic tumors occurring in the orbit are the dermoids. Berlin cites seventy-three. Yet only a portion of these are unqestionable. We may distinguish with Mitvalsky between cysts of the rim of the orbit which have secondarily extended into the orbit and true orbital cysts. With reference to the genesis of dermoids of the orbit, Mikulicz considers them to have originated from the structures giving rise to the lens, Whether dermoids at the external edge of the orbit have the same origin is questioned by Mikulicz. These cysts are, of course, always congenital, but only a small number are so recognized. This arises from the fact that in the beginning they are, as a rule, small and only increase in size later. The age of puberty is the time when rapid growth takes place. We therefore find that 82 per cent come under observation between the first and twentieth year, and only 18 per cent after this time.
A look at the past. . . Arch Ophthalmol. 1999;117(4):510. doi:10.1001/archopht.117.4.510
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