NEW STROBOSCOPIC LIGHT-SOURCE FOR INTRAOPERATIVE RETINAL FLUORESCEIN ANGIOGRAPHY

We tested a new stroboscopic light source for intraoperative fluoresce in angiography. A pulsed xenon light source and narrow-band interferen ce filters are coupled to a 20-gauge endoilluminator and a 35-mm camer a mounted on a surgical microscope. The system was tested with good su ccess in a patient undergoing penetrating keratoplasty. An 18- to 22-m uJ flash of 2 milliseconds' duration is achieved, which is well below the safety threshold level. This new stroboscopic light source provide s a flash of sufficient light intensity to perform high-resolution, hi gh-contrast fluorescein angiography during operations for the removal of opacified media.