Abstract: A flexible contact lens (20) is disclosed as having a central power portion (24), a peripheral flange portion (27), and an externally concave transition portion (26) joining the central portion and the flange portion, whereby the flange portion extends outwardly from the central portion in the manner of a hat brim. The inner edge of the peripheral flange is thereby raised from the eye surface to facilitate movement of the lens over the limbal region of the eye. The extent of the peripheral flange forward from the eye surface promotes eyelid contact to enhance movement of the lens on the eye. In a second embodiment (40), the lens further includes an externally convex transition portion (45) joining the central power portion (44) and the externally concave transition portion (46) to facilitate lens handling.

Abstract: A lock ring prevents inadvertent rotation of a rotatable focusing eyepiece for an optical instrument. The ring is disposed on the device and is fixed against rotation. A face is provided on the ring which is adapted to frictionally engage the eyepiece to prevent inadvertent rotation thereof. The ring is movable or deformable to disengage the face from the eyepiece for focusing.

Abstract: A binocular with a focusing/locking knob having a pair of essentially flat paddle platforms which are easily contacted by the fingertips of a user. The paddle platforms being independently pivoted on the knob and having means for preventing rotational motion for locking the knob. The means for preventing rotation being engaged by pivoting the paddle platforms in one direction and disengaged by pivoting the paddle platforms in the opposite direction.

Abstract: A method of manufacturing a dual purpose sunglass lens having a gold appearance, as well as the lens itself, is described wherein a photochromic lens is coated on its front and rear surfaces with a titanium monoxide material. An antireflection substance is overlyed onto the titanium monoxide deposited on the rear surface. The sunglass lens has a transmittance of approximately 10% at 20.degree. C. and a transmittance of approximately 5% at 0.degree. C. in bright sunlight.

Abstract: Apparatus is disclosed for pre-determining laser coagulation dosages and for monitoring laser photocoagulation during treatment by detection of radiation produced in the eye. Embodiments of the present invention comprise means for applying radiation to a target in an eye (1, 2, 3, 5, 6, 7 and 9) and means for detecting the radiation produced by the target having wavelengths different from the wavelength of the applied radiation (4, 200, 12 and 13). In various embodiments, the radiation produced by the target is fluorescence radiation, Raman radiation, two photon excitation radiation and so forth.

Abstract: A microscope is provided which is simply, accurately and inexpensively constructed from substantially all extruded parts. The modular construction of the microscope greatly reduces the costs of the instrument without sacrificing accuracy. The modularity further provides for a microscope which is readily adaptable to serve several distinct and separate functions.

Abstract: A cartographic apparatus for determination of the elevations of features and heights of objects from stereoscopic images of complementing input records includes a parallax bar and movable reticles for generating a floating mark over points of interest in the records. The apparatus also includes a microprocessor to compute compensation factors based on values determined during initial set up and means responsive to those factors to compensate automatically for y parallax and for errors in x parallax difference as the floating mark is moved and to compute automatically object heights and feature elevations.

Abstract: A support member for a precision optical instrument includes an integral bearing guide member for providing relatively friction-free movement to a movable member. The integral member 15 is pivoted with respect to the movable member to adjust the amount of play between the support member and the movable member.

Abstract: In a reticle plate, a pattern is provided which contains a material that, when activated by a particular source of light, becomes highly visible in the field of view of the viewing instrument.

Abstract: A precision optical instrument includes an auxiliary focusing mechanism coupled to the primary focusing mechanism such that rotation of the auxiliary mechanism rotates the primary mechanism.

Abstract: Contact lens disinfecting apparatus is provided having first and second lens-holding chambers, an electrically conductive heat sink thermally coupled to said chambers, electrically energizable heater thermally and electrically coupled to the heat sink, a thermostat, a second heat sink coupled to the thermostat and a thermally and electrically conductive heat transfer member connected between the heater and the second heat sink.

Abstract: A slide mechanism for use in transporting a stereoscope along a horizontal support arm of a photogrammetric instrument includes a member slidably mounted to a pair of support tracks cantilevered to the support arm. A clamping mechanism is used to lock the slide member in a first predetermined position on the support tracks and is unlockable to enable the slide mechanism to be moved along the support tracks to a second position.

Abstract: An adjusting mechanism for an optical instrument such as a microscope has a plurality of pulleys which are coupled together by a flexible, non-elastic cable. One of the pulleys is fixably rotated to a support member while the other pulleys are rotatably fixed to a movable member. The cable is further coupled to an adjusting shaft. Both ends of the cable are fixed to the support member. Rotation of the adjusting shaft takes up the cable on one side of the pulleys and pays out an exact and equal amount of cable on the opposite side of the pulleys. The pulleys fixed to the movable member are, consequently, moved a proportional amount. The movable member is displaced an exactly equal amount. The adjusting mechanism includes a counter balancing member which is adjustable to counteract the forces exerted upon the movable member.

Abstract: A unique lens (10) having a peripheral carrier surface (13), a central optical zone (18) providing the toricity required to achieve a given spherical and cyclinder correction that is oriented to a selected axis angle (.psi.) and an intermediate, annular, transitional surface (15) between the optical and carrier surfaces (16 and 13). The method and apparatus for providing such a toric lens (10) employs a generator (50) that produces a sinusoidal signal in response to rotaton of the lathe spindle (26), and a signal that is selectively phased at a predetermined angularity with respect to the circumference of the rotatable spindle (26). The aforesaid signal is applied to a tool post oscillator (90) in order to oscillate the tool (36) in synchronization with rotation of the spindle (26) thereby cutting both curves of the toric surface (16) in one pass.