Light transport is currently used clinically both as a therapeutic tool and as a diagnostic tool. A concern in all these cases
is the difficulty of knowing which regions of the tissues are sufficiently illuminated for therapeutic results, or from which
regions the collected fluorescence was emitted. Development of optical models that explain the observed scattering
properties of soft biological tissues is of considerable interest. Such modeling can give how the scattering properties are
influenced by the numbers, sizes and arrangements of the tissue structure. In this article we give a brief overview of the
laser light transport in tissue and also discuss some representative applications of tissue optics for biomedical
applications.
To solve some microsurgical procedures in the anterior and posterior chambers using the photo disruptive effect, a
special Nd:YAG nanosecond laser device is presented. The Nd:YAG laser is q-switched (Cr4+:YAG). The laser beam is
expanded. After expansion, the laser beam is passed through a circular variable filter which is rotated by a processor,
allowing energy to be set at any value in the range of 0.5-10 mJ. Two infrared LED-phototransistor pairs are used to
position the filter. The laser beam is focused by the objective at 150 microns behind the object plane to avoid the damage
of the Intraocular Lens.
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