No ocular changes could be found in animalsexposed for 15 or 30 min at power densities of 100 or 200 mW/cm2. Also no longterm effects under these exposure conditions could be observed by monthly examination for a one-year periode. At 300 mW/cm2 and above, acute effects, such as miosis, anterior chamber flare, injection of the conjunctiva, and dilations of irisvessels, were found. These effects persisted for as long as 24 h and were believed to be caused by thermalstress. One year after exposure these changes were absent.