Hi there, i would like to improve the polishing quality of opthalmic lenses and use a DOE for it. The opthalmic lenses are being polished and at the end of a process needs to be checked the following: 1. by sight, if the surface is polished well (no markings from previous smoothing operation) 2. by sight, surface shall not content scratches, pits or dots 3. surface can not be polished too much, because of power of a lens (the more is a lens polished, the more deviation could be occured) The problem, that i am not able to overcome is, how to evaluate a response. There is no measurement device for that, any exact value. The third point could be measured, but response is a map with surface deviations. And even with perfect results, the first two points needs to be done. I was wondering to set up some results ranking. To make 16 experiments and the response would be ranked from 1 to 16. The number 1 for the best result and the number 16 for the worst one. Or to split the responses into two categories ? The point 3 gives a certain measured number and the second response would give 0 or 1. (0- lens is not polished well, and contains scratches, spots and 1 for lens is polished well, and contains any scratches, spots etc. ) Does somebody have exprience with no measurable response ?