I had surgery on both eyes with what they called a “YAG” laser. Just as the Dr. said, it was a piece of cake.
I read up on it and before lasers, it was a difficult operation often accompanied by problems.
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I'm sure there was a reason they didn't call it the GAY laser....
a “YAG” laser is one whose frequency and other characteristics is governed by its use of Yttrium Aluminum Garnet; a synthetic gemstone grown in and crystallized out of high-temp furnaces.
My Dad used to have a synthetic gemstone business and peddled chunks of YAG for home-brew gemstone faceters to cut up.