A posterior capsulotomy is a non-invasive laser procedure to eliminate the cloudiness that occasionally interferes with...

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A posterior capsulotomy is a non-invasive laser procedure toeliminate the cloudiness that occasionally interferes with apatient's vision after cataract surgery. For this procedure aNd:YAG laser with pulse duration of 30 ns is focused to 50 – 100 µmin diameter on the posterior capsule to cut a thin membrane whichhas become cloudy over time. Estimate the pulse energy necessary toachieve optical breakdown during this treatment, because otherwiseall laser energy will be absorbed by the retina and other tissueslying underneath.

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The intensity required for optical breakdown depends on pulsedurationGenerally the    See Answer
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