Biomedical Engineering Reference
In-Depth Information
B
Light rays originating at infinity
Face-on view of sensor
C
Light rays emerging from eye
Face-on view of sensor
Figure 15-10.
A.
As the distance from an object increases, the wavefronts become
flatter. When the object is located at infinity, the wavefronts are flat.
B.
Flat wavefronts
from light originating at infinity cause a regular grid pattern to be formed on the sensor
of the Hartmann-Shack aberrometer.
C.
The aberrations of the eye cause the wave-
fronts that emerge from the eye to be distorted. These distorted wavefronts result in
an irregular grid pattern.
