Abstract: An improved tenometer provides for a bellows and a stepper motor to pressurize the interior of a probe in the barrel into which the probe is fitted for moving the probe outward towards a patient's eye. The device also includes a laser for improved centering of the patient's eye over the eye piece, and a safety detection device for terminating operation of the tenometer if the probe fails to move along the barrel after a given amount of pressure is applied to the interior of the barrel and the probe. A rotatable occluder near the head rest for blocking the eye not being tested and a computer in the instrument records the eye being tested and the test results.

Abstract: A system for selectively releasing materials, such as drugs or dyes, at a specific site in the body of an animal. The system uses laser radiation to rupture laser light-absorbing and heat-sensitive lipid vesicles containing the drugs or dyes, thereby releasing these materials at the specific site irradiated by the laser. By using this system, the location and concentration of the materials are controlled as well as the duration of the materials' release and the release can be triggered repetitively. The laser beam used is visible or its location can be made visible to the naked eye so that the location and size of the beam's contact with the irradiated tissue can be observed and adjusted.

Abstract: A method and apparatus for measuring the retinal or nerve fiber layer thickness. A beam of light is focused on the retina. Reflected beams from the anterior and posterior surfaces of the retina are detected and analyzed to quantitavely determine the retinal thickness.