A laser beam is used to change the shape of the lens of the eye, thus changing its focal length.įigure 17.14 Click here for the Lasers simulation. Laser eye surgery has improved the vision of many people, without the need for corrective lenses.One of the advantages of using a laser as a surgical tool is that it is accompanied by very little bleeding.A holographic image is produced by constructive and destructive interference of a split laser beam. Holograms take advantage of the wave properties of light, as opposed to traditional photography which is based on geometric optics. A viewer can move around the image and see it from different perspectives. The name hologram means entire picture (from the Greek holo-, as in holistic), because the image is three-dimensional.
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