Things to consider when writing for touch screen?

Question

I\'m starting a new project which involves developing an interface for a machine that measures wedge and roundness of lenses and stores the information in a database and reports

Answer 1

The other responses are pretty good, but are you totally sure that a touch screen would actually be easier to use? There are a lot of devices where a touch screen actually makes them much harder to use, not easier. The main problem is that you can't use the device when you're not looking at it. If users are going to be doing a lot of repetitive actions, a keyboard could be a lot more efficient.

Also, a touch screen might be a lot harder to use by someone with a disability, if you think there's even a small chance that could happen.