Effect of pre-exposure fundus temperature on threshold lesion temperatures in the laser-irradiated rabbit retina.
The relationship between pre-exposure fundus temperature and the temperature rise which produces a threshold burn was examined in rabbit eyes exposed to an Argon c. w. laser (4,880 A) for 10 seconds. The posterior pole of the eye was surgically exposed and a 20-micron tip diameter probe was inserted into the ocular fundus to measure temperature rises. The temperature rise for threshold burns linearly increased as preexposure fundus temperature decreased, implying a constant threshold temperature. Threshold temperature was indirectly predicted to be 52.4 degrees C. using a system with an estimated error of plus or minus 1/2 degrees C.
D000818:Animals; D005654:Fundus Oculi / Q000502:physiology*; D007834:Lasers / Q000009:adverse effects*; D008452:Maximum Allowable Concentration; D011817:Rabbits; D011829:Radiation Dosage; D011830:Radiation Effects; D011833:Radiation Injuries, Experimental; D012160:Retina / Q000528:radiation effects*; D013696:Temperature