Application of acoustic radiation force in ophthalmic ultrasound
Kinetic acoustic retinal evaluation (KARE) technique is developed which would noninvasively generate and image vitreal motion. A two step method is also developed for noninvasive repair of retinal detachments. In the first step, acoustic retinal manipulation (ARM) technique is applied to move the detached retina into contact with the retinal pigment epithelium. Next, laser photocoagulation or cryopexy are used to form a lasting bond between the retina and underlying tissues. Results indicate that it may be possible to induce vitreous and retinal displacement at acoustic intensities on the order of 1.0 W/cm2. Acoustic heating analysis indicates that the total thermal increase can be maintained below 1 °C for a ten second application.