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Anne, Even when product designers know better or are educated to design for the visually impaired designs are often dictated by marketing and business. As you know it took the federal ADA to change how buildings are designed. Perhaps part of your research can address the aesthetics as well and remind the industry that form _follows_ function.

Anne, Great work. Have you considered adding a raised frame around the controls to provide users with a reference point? If a large panel has multiple pads (e.g. burners on a stove) a raised frame can act as a registration point when touching the surface. The raised frame would not need to be functional but could have different textures (LF, LR, RF, RR, Oven)