A study by OptoFidelity has found a significant lack of touch screen accuracy with Apple's iPhone 5s and iPhone 5c displays. The company used its Touch Panel Performance Test to compare the iPhone 5s, iPhone 5c, and Samsung Galaxy S3 smartphones. OptoFidelity Touch & Test is a test platform for touch device testing. PDT stands for panel performance device level testing. … [Read more...] about Robotic testing finds touchscreen inaccuracies at edge of iPhone display