Abstract: There is disclosed a method and apparatus for providing spectacle correction on axis in a compound lens system. A lensometer having a lens stop assembly is used in conjunction with a collet fixture for positioning a lens and for aligning the lens in a compound lens system while employing the lensometer to enable optical alignment. The method operates by placing the lens in the fixture to firmly hold the lens and allowing the lens to protrude from the fixture. The fixture is then placed over the lens stop assembly of the lensometer and the compound lens system is then held against the lens as emplaced on the lens stop. By rotating the fixture, one can align the lenses on axis and determine the proper position of the lens in the compound system. The collet fixture which includes an inner tubular section having an open top and an open bottom. The tubular section is symmetrically disposed about an axis with the open top having a series of slots.

Abstract: This invention provides a method of obtaining increased efficiency in implementing a medical photograph by allowing the practitioner to utilize a slower speed film which has a high response to the color red and hues thereof. According to the techniques depicted herein, a flash or beam of light which is generated by means of an ignition tube or a flash bulb is directed through a condensing lens which lens directs the beam of light in a concentrated area thus allowing the practitioner to obtain a greater depth of focus with a higher f-stop. This thereby enables one to utilize a slower speed film which film inherently possesses a better response to the color red.

Abstract: There is disclosed a head-mounted imaging system which system employs a headband to be worn on the head of a surgeon during a surgical procedure. A surgeon may utilize a microscope eyeglass assembly in order for him to achieve a desired magnification of the operating area. The headband assembly includes an imaging system which imaging system furnishes a beam of light which beam of light is reflected into the operating area by means of a tiltable mirror coupled to the headband assembly. The tiltable mirror receives the reflected image from the operating site. This image is received by the imaging system where it is directed through a zoom lens magnification assembly whereby the magnification of the lens assembly is set to correspond to the microscope eyeglass assembly worn by the surgeon.

Abstract: There is disclosed an anamorphic lens system for increasing the field of view for patients or persons having tunnel vision. The lens assembly consists of a plano-concave cylindrical lens separated from a plano-convex cylindrical lens. The lens system is an anamorphic lens system which minifies in one meridian or axis such as the X axis while keeping objects at the same size in the other meridian such as the Y axis. In utilizing the system, a handicapped patient is now able to maintain almost their original visual acuity in the vertical plane while the system produces minification in the horizontal plane. By using such a technique, the patient retains almost full visual acuity, experiences a substantial increase in his field of vision, and furthermore, does not lose the ability to judge depth.

Abstract: There is disclosed a VIDEO AUTOMATIC FOCUSSING SYSTEM in which a video signal from the television camera is directed to a band pass filter and then detected to produce a DC signal indicative of the video signal as band limited. The detected signal is directed to the inputs of a negative slope detector and peak detector. The detectors monitor the slope of the video signal to form the basis for controlling the motor to achieve automatic focussing on command.

Abstract: There is disclosed a simulator for simulating a reduced peripheral field of view for the eyes of a normal user. The simulator consists of a frame having a front section upon which two eye pieces or binocular tubes are mounted. The frame has adjustable temple pieces which are adjustable in the horizontal direction and are adjustable to provide an angle with respect to the vertical so as to adjust the tilt of the frame when it is being worn by the user. Each binocular tube is associated with a variable iris diaphragm which enables the practitioner to adjust the opening to thereby simulate a different field of view according to the particular visual defects associated with a handicapped user. The simulator has left and right shields depending from the temple sections to prevent side vision when the frame is being accommodated by the user. In employing the simulator the device will provide an accurate replica of a reduced field of view such as that existing in a patient having tunnel vision.