This video shows a laser iridotomy performed on an eye with angle-closure glaucoma. A laser periphery iridotomy (LPI) is a procedure where you use a laser to blast a hole through the iris. This allows fluid from behind the iris to flow forward into the anterior chamber … and eventually drain out of the eye. This “hole” thus allows the pressure to equilize on either side of the iris plane and thus prevents attacks of acute “angle-closure” glaucoma.
In this case, a Yag laser is being used. The key to success is to locate an iris crypt (an area of natural thinning) through which to aim your shots. Keep going until you see the plume of pigment/fluid come forward … watch this video, and it will make more sense.
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laseriridotomy.wmv (8.6 meg, Windows video file)