The wavefront changes as it propagates from the cornea to the pupil. This creates a problem as the wavefront is measured at the pupil but it is the cornea (3.5 mm in front of the pupil) that is being ablated. For just defocus, there is a simple calculation to adjust for this error, but I really question how these devices model how higher order aberrations propagate from the cornea to the pupil.
The wavefront changes as it propagates from the cornea to the pupil. This creates a problem as the wavefront is measured at the pupil but it is the cornea (3.5 mm in front of the pupil) that is being ablated. For just defocus, there is a simple calculation to adjust for this error, but I really question how these devices model how higher order aberrations propagate from the cornea to the pupil.
kaccie14 7 months ago