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A self defense weapon formed as a memo pad and which is easily held by a person's fingers, therefore making it possible to provide protection from a mugger and also to quickly and easily write a record or a message without failure of missing or forgetting significant information under a stressful situation.
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| Number | Title | Issue Date |
| 4784483 | Brightness acuity tester A brightness acuity tester to assess functional visual acuity in bright light conditions and to test for recovery of visual activity after photostressing the retina is disclosed. The tester essentially comprises a device closed in one direction and open i... | 11/15/1988 |
| 4764007 | Glare susceptibility tester An optical instrument and method for measuring susceptibility to glare of a human vision system is described which comprises a glare light source of preselected intensity sufficient to generate glare in the vision system of a subject, an acuity target hav... | 08/16/1988 |
| 4726672 | Acuity therapy unit An exercise device for improving poor visual acuity is disclosed in which a subject must identify randomly chosen figures of minimal visual stimulus projected in a darkened chamber. Earphones are provided to aid in the isolation of the subject and provide... | 02/23/1988 |
| 4682867 | Apparatus for the self-examination of the human eye Apparatus for self-examination of the human eye comprising a pen light for generating a beam of light, a reflecting sphere for orthogonally reflecting the beam through an opaque disc having a pin hole and a cylindrical head enclosing the reflecting sphere... | 07/28/1987 |
| 4679921 | Apparatus for eye examination An eye-examining apparatus comprises a first positive lens unit, a negative lens unit, a second positive lens unit, a third positive lens unit and a target mark arranged in the named order from the side of the examined eye. The third positive lens unit is... | 07/14/1987 |
| 4576454 | Eye fatigue simulator for optometry A simulation card for simulating the eye fatigue of a user of a display screen. The simulation card is adapted to mount in front of a lens changing apparatus. An opening in the card permits the eye doctor to examine the patients eyes while the patient foc... | 03/18/1986 |
| 4564274 | Visibility gauge A visibility gauge in the form of a disc or strip of diffusing material arranged to be interposed in the light path from a subject to an observer. The diffusiveness of the strip varies along its length so that the contrast between the subject and its back... | 01/14/1986 |
| 4550990 | Arrangement for the carrying out of eye examination The invention refers to an arrangement for the carrying out of eye examinations by means of an optotype mask which is illuminated from behind. It consists therein that the optotype mask is arranged in front of the picture screen of a video tube which serv... | 11/05/1985 |
| 4545658 | Visual examination apparatus A visual examination apparatus for administering a photostress recovery test. The photo pigments of the cones of the subject eye are conditioned to a steady state by exposure to a dim light which retro-illuminates an optotype. The size of the optotype is ... | 10/08/1985 |
| 4452515 | Eye testing device An improved eye testing apparatus is provided which permits the operator thereof to precisely and clearly designate certain characters of the eye test pattern. The device includes an external stage, a duplicate test pattern on the stage, and a mask having... | 06/05/1984 |
| 4411501 | Device for checking the phoria of an individual under conditions of close vision This device is associated with spectacles 35 which are intended to be worn by the individual in question and which are equipped with crossed analyzers 36, 37. It comprises a ruler 10, which carries a scale 11 and can be seen in polarized light correspondi... | 10/25/1983 |
| 4410244 | Retinal acuity testing device Optical measuring and testing apparatus incorporating a holographically recorded, single-frequency, optically thin phase grating. When this phase grating is illuminated by a quasi-monochromatic spatially coherent light source, it acts as a basic common pa... | 10/18/1983 |
| 4379626 | Facility for conducting ophthalmological examinations A facility for conducting ophthalmological examinations or tests on a plurality of patients, includes, in a preferred embodiment, a first examining station defined by a room having an opening provided in one wall thereof used in conjunction with a second ... | 04/12/1983 |
| 4368959 | Apparatus for and method of testing vision The apparatus and method comprise means to evaluate the interocular latency difference known to exist in individuals afflicted with multiple sclerosis. The apparatus includes two horizontal rows of 10 light emitting diodes separated by a horizontal partit... | 01/18/1983 |
| 4365874 | Oculotorsionometer An apparatus for measuring torsional rotation of an eyeball about the visual axis by means of an afterimage. The apparatus includes a frame mountable to a patient so as to be fixed with respect to the patient's skull. Mounted on the frame are means for cr... | 12/28/1982 |
| 4298253 | Method and apparatus for presenting test images at different distances from a subject Method and apparatus for presenting test images to a subject at different distances and a constant visual angle. The test indicia are located at a single predetermined distance from the viewer. An optical system is provided between the test indicia and th... | 11/03/1981 |
| 4285580 | Color vision perception testing device A controlled color source used in testing color vision perception includes a cathode ray tube capable of producing the three primary colors and at least one photo-detector array coupled directly to the tube screen for sensing the primary color output of t... | 08/25/1981 |
| 4279479 | Vision screening kit A simple, inexpensive vision screening device in the form of a compact kit.... | 07/21/1981 |
| 4257690 | Eye testing chart An eye chart having a plurality of rows of letters where each letter is composed of a line-stroke having a plurality of adjoining black and white segments to provide an average reflectance which is the same as the reflectance of the gray background of the... | 03/24/1981 |
| 4239351 | Apparatus for generating and displaying visual acuity targets First and second electro-optical display devices for displaying visual acuity targets, one of which is adapted to be viewed by a patient and the other of which is adapted to be viewed by an examiner. An electronic memory is connected to the display device... | 12/16/1980 |
| 4192582 | Ophthalmometer Ophthalmometer comprising a chart projecting optical system for projecting a Landolt type inspection chart and a lens means for locating a corrective lens in the projecting light path. A manually operated switch is provided for actuation by a patient. A m... | 03/11/1980 |
| 4188097 | Method of and apparatus for testing visual integrity A method of and apparatus for determining the visual integrity of an individual is disclosed. An equal amount of visible light intensity is provided to the right and left eyes by viewing a target through a binocular viewing mechanism. The eyes of the indi... | 02/12/1980 |
| 4161353 | Secondary image reproduction device A device to attach to an optical projector having a beam opening for passage of a beam of light rays to project a primary image on a main surface, a lens system to simultaneously produce a duplicate image of the primary image on a second surface beamed in... | 07/17/1979 |
| 4113363 | Process and apparatus for astigmatic and spherical subjective testing of the eye An apparatus and process for determining subjective astigmatic and spherical prescription for the eye is disclosed. A target, consisting of a line of small angular divergence, is focused for maximum clarity by the adjustment of spherical optics, causing t... | 09/12/1978 |
| 4105303 | Method for determining the refractive correction for an eye An improved method is disclosed for determining the refractive correction for an eye. The method is an improvement over the method described by W. E. Humphrey in his U.S. Pat. No. 3,947,097. The improved method uses apparatus having only one variable asti... | 08/08/1978 |
| 4094592 | Ophthalmic examination chart projector Ophthalmic examination chart projector including a rotatable chart carrying disc and a mask plate which are co-axial with each other. A light source and a projecting lens assembly are provided for projecting one of the charts on the disc and one of the ma... | 06/13/1978 |
| 4070102 | Apparatus for sensory control of a person undergoing test A sensory control apparatus to determine the visual acuteness of persons tested. The apparatus has at least one optical device to view images of figures provided by a step-by-step parade means. The apparatus is operated by an electronic command module ope... | 01/24/1978 |
| 4027954 | Eye-testing apparatus A device for testing eyes provided with a rotatable drum located within a light impermeable casing in which the drum carries a plurality of slides bearing characters positioned on the perimeter of the drum and illuminated by a lamp located within the drum... | 06/07/1977 |
| 4015899 | Eye test apparatus with physician routed patient input adjustment to variable optical elements Corrective optics having continuously variable spherical, astigmatic, and prismatic functions are placed in a light path between a viewing patient and a projected target. Typically, the target is projected by a projector preferably through focusing optics... | 04/05/1977 |
| 3970376 | Device for testing color vision The color vision of a subject to be tested is evaluated by the presentation of a series of test panels having different colors to the subject. Each pair of test panels has prescribed maximum emission values over established wavelength ranges and wavelengt... | 07/20/1976 |
| 3969020 | Automatic refraction apparatus and method Apparatus and method provide for automatically measuring the refractive error of the human eye and thus the prescription for lens or eye glasses for correcting this error. Test symbols are alternately presented at two different locations on a test screen ... | 07/13/1976 |
| 3947186 | Eye-test lens and method The invention is a test lens made to fit a standard optometrist's trial-lens frame. The lens is a crossed-cylinder astigmator of about &#b1; 5 diopter strength, preferably formed by cementing together a first planoconvex cylinder lens of about 5 diopter s... | 03/30/1976 |
| 3947099 | Solid state color anomaloscope Apparatus for evaluation a human subject's color vision response including light emmiting diodes providing luminance in the yellow and red and green color spectrums, means for controlling the individual luminescence of the red and green diodes in an inver... | 03/30/1976 |
| 3947097 | Process and apparatus for astigmatic and spherical subjective testing of the eye An apparatus and process for determining subjective astigmatic and spherical prescription for the eye is disclosed. A target, consisting of a straight line, is focused for maximum clarity by the adjustment of spherical optics, causing the line to become p... | 03/30/1976 |
| 3936163 | Vision examination lens system An optical system utilizing a single spherical and two cylindrical lenses. The cylindrical lenses are located along the optical axis of the spherical lens and between the spherical lens aand an optical target. A first of the cylindrical lenses is fixed lo... | 02/03/1976 |
| 3936162 | Night vision testing method and apparatus A subject whose vision is to be tested wears a face mask having an eyepiece in which is mounted a light-emitting diode connected to means for varying the light intensity of the diode in a time ordered sequence. The level of light intensity is also numeric... | 02/03/1976 |
