Eye wavefront sensing and correction
Laser speckle image
A speckle image of a model eye created with a laser.
Simulated Shack-Hartmann wavefront image
This image shows the distortions in the model eye as they would
be image by a Shack-Hartmann wavefront sensor with a 10 x 10 element resolution. Whilst the
sensor can determine the basic form of the distortions its low resolution prevents it from
providing fine details.
Actual QPI wavefront image
The QPI wavefront image is generated at the native resolution of
the camera taking the image, around 800 x 800 pixels in this case. With 6,400 times the
number of samples the QPI technology is able to generate a vastly more detailed image
of the eye's distortions.
Vision correction using simulated Shack-Hartmann data
If we were to use the wavefront image generated by the Shack-Hartmann
sensor we could improve the blurring caused by the eye's optical irregularities, but we would
be limited in the accuracy of our treatment by the low resolution of the Shack-Hartman sensor.
Vision correction using QPI wavefront data
By applying the QPI wavefront image to the same eye chart we are
able to deliver a significantly better result due to the much greater resolution of our
technology.