04598714 is referenced by 12 patents and cites 3 patents.

An apparatus is disclosed for measuring the thickness of the corneas. Corneal thickness is measured by first directing ultrasonic pulses towards the cornea and timing the interval between reflected pulses. The apparatus also includes a pulse stretcher for enlarging the width of the pulse representing the interval between pulses reflected from the inner and the outer surfaces of the cornea, so that the time between pulses can be accurately measured by a conventional, low-frequency electronic clock. The invention further comprises electronic gating means for rejecting spurious pulses.

Title
Apparatus for measuring the thickness of corneas
Application Number
6/468289
Publication Number
4598714
Application Date
February 22, 1983
Publication Date
July 8, 1986
Inventor
Edward R O Brien
Wayne
PA, US
Frederic B Kremer
Bala Cynwyd
PA, US
Agent
Steele Gould & Fried
Assignee
Accutome
PA, US
IPC
A61B 10/00
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