I have therefore a "CSL - TM137U Optical Mouse / vertical version" ordered. But herewith I was not satisfied. The left mouse button was to depress slightly and was therefore triggered unintentionally. In addition, it was rather unfavorable even with this mouse for a relaxed hand position.
By chance I read a rather negative review of this mouse. Has criticized the situation there the mouse button and the perceptible click point. But that was exactly what I was looking for.
I have for my computer now three mice of this model in use. I'll be so well understood and can be any similar problems only recommend this cheap mouse try it.