You can see how the areas of my visible right eye (during treatment, because of the loss of central vision in my left eye, the ‘tracking monitor’ was watching my right eye instead of my left eye that has the tumor) are marked on the monitor.
Should I lose the flashing light that I must train my eye at to be certain the proton beam is directed correctly, the doctors will immediately put a stop to the beam so as to not cause additional damage to my eye. It’s only the tumor we want, not the whole eye.
A patient not being able to maintain his aimed eye line during the treatment increases his chances of losing the eye. Fully 1/3 of proton radiation treatment patients have to have the treated eye removed. This is usually due to the tumor killing the eye before the radiation kills the tumor, I believe. Hey, staring at a flashing light at the edge of your vision for 90 seconds seems easy at first…. but it isn’t.
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