Freeze frame analysis on high speed cinematography of Nd/YAG laser explosions in ocular tissues.
High speed colour cinematography at 400 frames per second was used to photograph both single and train burst Nd/YAG laser applications in ox eyes at threshold energy levels. Measurements of the extent and speed of particle scatter and tissue distortion from the acoustic transient were made from a sequential freeze frame analysis of the films. Particles were observed to travel over 8 mm from the site of Nd/YAG application 20 milliseconds after a single pulse at initial speeds in excess of 20 km/h. The use of train bursts of pulses was seen to increase the number of particles scattered and project the wavefront of particles further from the point of laser application.
D000818:Animals; D002417:Cattle; D066298:In Vitro Techniques; D007498:Iris / Q000601:surgery; D007834:Lasers; D009040:Motion Pictures; D013508:Ophthalmologic Surgical Procedures; D012542:Scattering, Radiation; D013997:Time Factors