The Bausch & Lomb Zywave
- evaluates the eyes "fingerprint" (higher order abberations)
The Zywave aberrometer uses wavefront technology. Wavefront technology was first applied in astronomy, allowing astronomers to move beyond the limitations of telescopes to image extraterrestrial objects that might have been obscured due to atmospheric aberrations.
The Zywave detects and measures the eyes "fingerprint" (higher order aberrations). Higher order aberrations are responsible for each individual eye focusing light in a unique pattern. Each patient's Zywave is specific and unique. Each component of the eye can contribute to higher order aberrations.
Generation of a wavefront with the Zywave:
A short pulse of low intensity red laser light is focused onto the back of the eye.
Analysis of a wavefront with the Zywave:
The reflected light from the back of the eye travels through the eye's optics (cornea and lens). This outgoing light forms the wavefront analysed by the Zywave.
The outgoing wavefront is analysed by passing it through an array of small lenses. These lenses focus the wavefront onto a CCD chip similar to that used in videos or in digital cameras. The pattern on the CCD chip is analysed by the Zywave software to create a picture of the wavefront for each individual eye.
