The VISX WaveScan Wavefront System is an ophthalmic diagnostic instrument that measures the refractive error and wavefront aberrations of the human eye using a Hartmann-Shack wavefront sensor. The VISX WaveScan measurements can be used to determine regular (sphero-cylindrical) refractive errors and irregularities (aberrations) that cause decreased or blurry vision in the human eye. The VISX WaveScan software uses the information to create a custom tailored correction map for the unique characteristics of each individual eye.

The VISX Fourier Wavefront Upgrade has the ability to capture and treat wavefront information on larger pupil patients and utilize this data for optical zone treatments out to 7mm. Transition zones continue to be adjustable out to 9.5mm. The VISX WaveScan utilizes the patient’s corneal K-values and wavefront measurement to create the optimal corneal shape for each individual, whether it be prolate, oblate, or spherical.

Together, the VISX WaveScan Wavefront System and VISX STAR S4 Excimer Laser System deliver unprecedented levels of measurement accuracy and outstanding treatment precision essential to the CustomVue procedure.

AMO VISX WaveScan Wavefront Features:

• Fourier-based wavefront algorithms:
o Fourier delivers the highest resolution available of the wavefront error
o Uses more data points to derive the optimal shape
o Uses all data from any shape of pupil
o Accurately reconstructs all peripheral data
o Captures and treats higher and lower order aberrations up to 7 mm diameter pupil
• Acuity maps on the VISX WaveScan chart the optical aberrations of the eye
• Difference Maps on the VISX WaveScan track the changes of the eye for pre-op and post-op comparisons
• Point Spread Function (PSF) on the VISX WaveScan demonstrates how a patient would see a point source of light