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| Number | Title | Issue Date |
| 7874676 | Vision tester A subjective vision tester includes a pair of right and left lens chamber units (2) each having a test window (4), a first lens disk (11-14) provided with an aperture and a plurality of optical elements (110, 120, 130, 140) and pla... | 01/25/2011 |
| 7438416 | Optometric apparatus An optometric apparatus for examining refractive power of an examinee's eye subjectively, capable of performing highly-precise examination. The apparatus has a test window through which a presented optotype is seen, a first spherical-power applying unit which applie... | 10/21/2008 |
| 7241013 | Optometric apparatus An optometric apparatus comprises: a pair of right and left lens chamber units, each unit including a test window and optical elements to be selectively disposed in the test window; and a controller including a transmitting part which transmits a control signal in t... | 07/10/2007 |
| 7237897 | Optometric apparatus An optometric apparatus comprises: a pair of right and left lens chamber units, each unit including a test window and optical elements to be selectively disposed in the test window; a convergence unit which converges the right and left lens chamber units; an input u... | 07/03/2007 |
| 7198368 | Optometric apparatus An optometric apparatus (1) for subjectively examining a visual function of an examinee's eye, includes: a pair of right and left lens chamber units (5), each including a test window (5a) and optical elements to be changeably disposed in ... | 04/03/2007 |
| 7159984 | Subjective optometric apparatus Disclosed is a subjective optometric apparatus in which the earpiece members and the nose pad member for attaching the main body of the device to the subject can be easily adjusted without involving any effort. The subjective optometric apparatus has a horizontal fr... | 01/09/2007 |
| 7144112 | Optometric apparatus An optometric apparatus (2) includes a rotary prism (136a, 136b) disposed in front of the eye (E), for adding a prism degree to the eye (E); a rotation device including a pulse motor (181, 184) and a rotation transmitting me... | 12/05/2006 |
| 6923541 | Optometric apparatus An optometric apparatus for a subjective examination of a visual function of an examinee's eye includes a pair of right-and-left lens chamber units, each having test windows; and rotary disks disposed in each unit, each disk holding therein optical elements, one of ... | 08/02/2005 |
| 6666555 | Ophthalmic refractor having retrofittable readout illumination A subjective ophthalmic refractor is improved for operator visibility in a darkened examination room by forming a cylinder axis scale of the refractor as a light-transmitting component having opaque scale gradations and installing a polar array of illumin... | 12/23/2003 |
| 5812241 | Compact refractor for subjective examination of human eyes A compact and precise phoropter of low requirements as to material and favorable as to kinematics comprises two observation channels in each of which a plurality of equal sized disks are rotatably and coaxially arranged about an axle, each of said disks b... | 09/22/1998 |
| 5648833 | Motorized instrument for the examination of human eyes A phoropter comprises two observation channels, in each of said observation channels a plurality of disk-shaped mounts, rotatably seated about at least one axis, for mounting optically effective members and drive means for rotating said mounts. The drive ... | 07/15/1997 |
| 5319399 | Optical alignment device An optical device for aligning an instrument so that active zones in the instrument are the same distance from the plane of a remote object comprising a lens attached to the instrument, the lens having a curved outer surface and a mirrored back surface. W... | 06/07/1994 |
| 5285224 | Methods and apparatus for determining refractive error Methods and apparatus for measuring or determining refractive errors are disclosed. In some embodiments the invention includes two bars, each containing multiple lenses positioned longitudinally along the bar, and a collar adapted to constrain relative mo... | 02/08/1994 |
| 5278593 | Ophthalmic dial advancement system An ophthalmic dial advancement system for vision testing apparatuses, such as ophthalmic refractors of the type which utilize a single dial sphere control for advancing the lens power of at least one of the lenses positioned within the lens housing. A rot... | 01/11/1994 |
| 5220362 | Ophthalmic lighting apparatus An ophthalmic lighting apparatus for operable attachment to ophthalmic articles, such as ophthalmic refractors, which articles are capable of supporting and deploying a protruding reading card rod, a reading card holder and accordingly a reading card duri... | 06/15/1993 |
| 5120124 | Devices for determining the crossed cylinder powers and axes for multiple lens sets Apparatus and techniques for measuring and determining the crossed cylinder powers and axes obtained through independent rotation of cylinder lenses are disclosed. Degree scales associated with each lens provide angular measurements for use in connection ... | 06/09/1992 |
| 5104214 | Trial frames, adjustable spectacles and associated lens systems Trial frames including two independently rotatable cells alignable with each eye are disclosed. Each set of cells is designed to house a pair of either cylinder, polarized, prism, crossed cylinder or sphero-cylinder lenses as appropriate for correcting op... | 04/14/1992 |
| 4943162 | Astigmatic self-refractor and method of use A new lens system and method of use for otherwise conventional refractors comprising a five-lens, variable crossed cylinder lens attachment and selectable fixed crossed cylinders which may be placed in the examining optical path. The variable crossed cyli... | 07/24/1990 |
| 4887897 | Eye examining apparatus An eye examining apparatus has an eye examining lens of an elastic material opposed to an eye to be examined, and control means for causing the marginal portion of the eye examining lens to protrude or sink to thereby change the lens surface of the eye ex... | 12/19/1989 |
| 4840479 | Crossed cylinder lenses refractor with three-lens variable crossed cylinder assembly and method of use A new lens system and method of use for otherwise conventional refractors comprising a synchronized, three-lens, variable crossed cylinder lens attachment and selectable fixed crossed cylinders which may be placed in the examining optical path. The synchr... | 06/20/1989 |
| 4820040 | Crossed cylinder lenses refractor and method of use A new lens system and method of use for otherwise conventional refractors comprising a synchronized, variable crossed cylinder lens attachment and selectable fixed crossed cylinders which may be placed in the examining optical path. The synchronized, vari... | 04/11/1989 |
| 4798457 | Self-conscious type eye examining apparatus A self-conscious type eye examining apparatus is provided with a Stokes' cross cylinder in a view field window, a spherical lens group having a plurality of spherical lenses selectively disposed in the optical path of the cross cylinder, a first electric ... | 01/17/1989 |
| 4606623 | Method for measuring intraoperative and immediate postoperative effects of radial keratotomy A method and apparatus for measuring the intraoperative and immediate postoperative effects of radial keratotomy are provided. Essentially, the method includes the steps of measuring the preoperative corneal thickness and radial distance along multiple me... | 08/19/1986 |
| 4606624 | Refractor having simplified cylinder lens assembly Disclosed is a refractor of the type having a housing which has patient eye position for viewing along a sight axis extendible therethrough, a pair of superimposed cylinder lens assemblies, means for positioning a particular lens in front of the sight axi... | 08/19/1986 |
| 4537480 | Motor-driven subjective phorometer A new subjective phorometer which can be a desk-type one in which all the measuring means are set on the desk plate and all the procedures for measuring vision data of eyes are carried out by control switches on the desk, and all the data measured are dis... | 08/27/1985 |
| 4523822 | Refractor with optically encoded cylinder axis position An ophthalmic refractor is provided which is configured for carrying out the Jackson cross-cylinder test. To improve accuracy, an optical encoder is provided in conjunction with each cylinder axis control knob and in conjunction with the lens mount of the... | 06/18/1985 |
| 4496225 | Motor control system for motorized ophthalmic instrument An improved refractor for use in the subjective examination of human eyes. Each half of the refractor includes a plurality of lens supporting disks, a hub assembly for rotatably supporting the disks, and a comb assembly to space the disks along the optica... | 01/29/1985 |
| 4496226 | ANDed motor control system for motorized ophthalmic instrument An improved refractor for use in the subjective examination of human eyes. Each half of the refractor includes a plurality of lens supporting disks, a hub assembly for rotatably supporting the disks, and a comb assembly to space the disks along the optica... | 01/29/1985 |
| 4436390 | Ophthalmic instrument having a cross cylinder lens An ophthalmic instrument having a cylindrical test lens and a cross cylinder lens which are adapted to be placed in an examining optical path. The cross cylinder lens is mounted on a lens tube which is rotatably mounted on a swingable lever about a pivot ... | 03/13/1984 |
| 4426140 | Refractor suspension system A compact refraction instrument for use in both the objective and subjective examination of human eyes. The instrument incorporates an alignment mode, a retinoscopy mode, a distance mode and near mode. For carrying out the functions associated with these ... | 01/17/1984 |
| 4413891 | Refractor optical system A refractor optical system having a new series of spherical and cylinder lenses substantially eliminates the irregular occurrence of additive errors when lenses spaced from the reference plane are used or more than two lenses are combined and permits corr... | 11/08/1983 |
| 4385813 | Phoropter Method for obtaining cross cylinder-like actions for using the adjusting or aligning measurement known as the cross cylinder method in phoropters for subjective refraction, wherein the spherical and cylindrical lens discs of the phoropter are adjusted in ... | 05/31/1983 |
| 4215919 | Refractor optical system A refractor optical system having a new series of spherical and cylinder lenses substantially eliminates the irregular occurrence of additive errors when lenses spaced from the reference plane are used or more than two lenses are combined and permits corr... | 08/05/1980 |
| 4185896 | Refractor cross-cylinder apparatus A pair of cylinder lenses have a combined power of zero when their cylinder axes are parallel and a small cross cylinder power when one lens is rotated until its axis is perpendicular to the cylinder axis of the other lens. Cross-cylinder lenses are used ... | 01/29/1980 |
