Aberrometer calibration
AssigneeBausch & Lomb Incorporated
InventorRonald J. Martino
Life of this patent
Estimating the term…
Abstract
A wavefront sensor for measuring ocular aberrations includes a calibration test component and comparative calibration measurement information stored in the device to insure that the device is properly calibrated for reliable aberration measurement. Wavefront calibration, focusing calibration, and retinal illumination level monitoring are contemplated calibration measurements. An optional interlock function prevents diagnostic/therapeutic operation of the aberrometer if it is out of calibration or unsafe for use. A method for calibrating an aberrometer is described.
Claims24
An improved wavefront sensor device for measuring ocular aberrations, said wavefront sensor including an optical head, a data acquisition, storage and processing system, and interlinking electronics integrated to detect, measure and display ocular aberration information from light reflected from a retina of an eye, the improvement characterized by:
- a wavefront sensor calibration component cooperatively engaged with the wavefront sensor;
- and
- an archived calibration measurement data that accurately represents a desired measurement parameter of the calibration component.
A method for calibrating an aberrometer, comprising:
- locating a test element having a known measurement parameter in an optical path of the aberrometer;
- making an initial measurement of the known measurement parameter using the aberrometer to obtain aberrometer calibration data;
- storing the calibration data in a storage medium of the aberrometer;
- making a test measurement of the test element at a selected time;
- comparing the test measurement with the stored calibration data;
- and
- verifying the calibration of the aberrometer within a pre-determined calibration range.
Dependencies are inferred from the claim text.