Michael Fei Chang

US Patent:

6631990, Oct 14, 2003

Filed:

Dec 19, 2001

Appl. No.:

10/024851

Inventors:

Manfred A. Schippert - Chelmsford MA
Michael A. Chang - Weston MA
Oscar K. Hollander - Falmouth MA
Sheldon H. Moll - Bedford MA

Assignee:

Acmed, Inc. - Bedford MA

International Classification:

A61B 310

US Classification:

351214

Abstract:

A measurement system is provided for measuring distances in the anterior chamber of an eye in conjunction with a slit lamp ophthalmologic microscope table. The measurement system includes a linearly movable interface assembly operative to pick up motions of the microscope assembly in a direction along an optical axis of the eye. A linear measurement assembly is coupled to the interface assembly and operative to determine a distance traveled by the interface. The measurement system may further be provided with a three-axis motion assembly and an optical microscope assembly mounted on the motion assembly. An image recording device is optically aligned with the optical microscope assembly to record images from the optical microscope assembly. A controller assembly is operative to control motion of the three-axis motion assembly in a first horizontal direction parallel to an optical axis of an eye of a patient, in a second horizontal direction orthogonal to the first horizontal direction to align the microscope assembly with both eyes, and in a vertical direction. The measurement system with image recording capability may be a stand-along system or incorporated for engagement and disengagement with an existing slit lamp table.