Headaches From Loupes?

What power is your loupe and what is your lighting source?
John1

Was gonna mention the lighting source because most likely you use your loupe under strong light. Most of the time I don't use my loupe, only a desklamp.

Mayby use a bigger magnifier?

I used to get headaches, but no more. I have my desk lamp with the magnafier and I look through the magnafier through the loupe at the coin. Works great for me, but everyone is different.

I get headaches after drinking beer.

That wouldn't help but if he keeps both eyes closed, that really will solve that problem.
1.Look into purchasing one of those magnifiers on a stand. Then you just slide the coins under that. Might be the constant movement of your head creating your eyes to contantly strain to correct focus.
2.Possibly your getting to old for this hobby. Then the solution is simple. Try bowling instead.
3. Always check for the type of lighting your using. If flourescent, change to a Incandescent lamp. Also, look into the new LED lamps that fit into a standard lamp socket. They are fantastic and run on 1-1/2 watts for a 50 to 60 Watt incandescent equivalent.
4. Pack up all your coins and send to me. I'll suffer with the head problems for you.

On a serious note most people should not be using fluorescent lamps for closeups. If your using one in the area where your working, you should try changing to either Incandescents, LED's or even metal halide.
What most people don't realize is Fluoresccnt lighting is based on a pulse of electrical charges running through a medium such as different types of gasses. By Pulse, this is a NON constant lighting and many people get headaches from this and don't know why. This is known as a strobiscopic effect and is really noticable if you watch a fan blade as you turn it on in the facinity of a Fluorescent lamp. The blades appear to speed up, slow down, sometimes almost look as if they stop. If that type of lighting is in your area, might well be the reason for the headaches.