MicroLight Corp. of America has added Wayne Good, M.D., to its medical advisory board. Good coordinated the research team that pioneered laser therapy for carpal tunnel syndrome during the past 12 years in the automotive industry. He has been participating in the design and execution of a study validating the application of MicroLight's ML830 low-level laser to treat repetitive stress injuries.. . .Robert Ripp has been elected to the board of PPG Industries effective March 1. He is chairman of Lightpath Technologies, a manufacturer of optical lens and module assemblies for the telecommunications sector. PPG Industries is a global supplier of coatings, glass, fiber glass and chemicals.. . .Elop ElectroOptics Industries Ltd., of Israel, announced it has received orders worth more than $40 million for electro-optical observation and surveillance systems from customers in Asia. The equipment is due to be supplied within two years.