My question is, what if the fluid is right at the retina’s optical focal point; will the laser interfere with that if they try and treat that spot?
People with the fluid at that spot have a blur right in the center of the field of vision.
The laser burns part of a blood vessel stopping the leakage. Your focal point is an imaginary point in space determined by your lens
You mean the fovea which is the part of the retina where the very center most detailed part of your vision is. And no, you can not even use sub threshold laser there as it will damage your vision. Sometimes if the point of leakage is adjacent to the fovea lasering it will improve vision, but edema involving the fovea usually has to be treated by injection.