Having formed one of Steve Jobs' nine key points about the new iPhone 4 this past Monday, Apple's Retina Display technology has been making headlines again today over claims that they are "false marketing". Wired spoke to Dr. Raymond Soneira, president of DisplayMate Technologies, who disagreed with Apple's suggestion that Retina Display, exceeded the "300 pixels per inch" quoted for an average eye. Soneira - though agreeing that the iPhone 4's display was likely to be the best smartphone screen on the market - converted 20/12 angular resolution to the linear resolution of a display, and came up with a figure of 477 pixels per inch at 12-inches, significantly higher than the iPhone 4's 326ppi. Since there are some big claims all round here, SlashGear spoke to Dr. William H.A. Beaudot, Ph.D. of Kybervision Consulting, a visual sciences expert with 20 years experience in the research and computer vision field. Dr. Beaudot told us that part of the confusion here is from the mistaken belief that 20/20 vision is "perfect", but that even at higher limits of visual acuity, Apple's claims still hold water.