Iridex Corp.’s revenues in the fourth quarter of 2012 were stronger than expected, driven by a healthy uptick in laser system sales. Located in Mountain View, Calif., the laser-based medical systems company reported preliminary revenue of approximately $9.2 million and $33.8 million for the fourth quarter and full year 2012, respectively. Management had projected Q4 revenues to be between $8.4 million and $8.7 million.