Diseases of the Pupilla.
The hole of the Ʋvea is termed Pupilla the Apple of the Eye. Between the Pupilla and Cornea there is a space, ful of Spirit and Watry Humor.
There is a double Disease of that space: Zinifisis, springing from a dry distem∣per, which consumes the Watry Humor and Dissipates the Spirit; or from a wound, which lets out the Watry Humor, and suffers the Spirit to vanish and reek away.
The other Disease of the space, is an Obstruction from a corrupted Flegmatick or purulent Humor. If it proceed of a purulent Humor or Quittor, it is called Hypopium: if the Obstruction be caused by Flegm, its termed Hypochyma Suf∣fusio. But Hypopium followes an Inflamation, and Hypochyma is caused for the most Part by a Congestion or Concretion of a thick Humor: if the Disease be pro∣per or primary, and do not arise by consent from the Stomath, sending Vapors up into the Eye.
Fernelius saw a thick and perfect Suffusion bred in one daies time; for if a thick Humor suddenly falling into the Optick Nerve do blind a man in a moment: why may not the same Humor falling lower into the Pupilla, breed a sudden and per∣fect Suffusion?
The narrowness of the Pupilla, springs either from the first formation in the Womb; or from a dry distemper, and then it is called Phthisis or Cor∣rugatio.
Galen writes that a smal Pupilla from from ones Birth is occasion of a very sharp sight but when it happnes a whil after, tis bad. In his first Book of the Causes of Symptomes. Chap. 2.
The Dilatation of the Pupilla is called Mydriasis or Platu-Corie. It springs from a moist distemper, or from a Rupture, or by breach of Continuity caused by a blow.