Abstract: An optometry apparatus includes: a housing accommodating a concave mirror disposed on a reference axis; and a display disposed outside the housing and out of the reference axis for projecting a target light flux onto the concave mirror. The concave mirror is configured to reflect the target light flux output from the display toward an examinee's eye along the reference axis.

Abstract: A lens meter includes a measurement optical system having a light source, measurement target plate, and light receiving sensor. A lens table has an opening where a measurement optical axis of the measurement optical system passes. A frame support member includes a support plate that contacts a left rim and right rim of a spectacle frame. The support plate is moved toward the lens table by a guide mechanism. The frame support member further includes a cutout portion in the support plate that allow the lens, placed on the lens table, to measure a point near an edge of the lens located on the support plate side. A pad contacts and prevents the rim from entering the cutout portion. The pad is provided in at least a part of the cutout portion. A pad moving mechanism moves the pad from the contact surface.

Abstract: An optometry apparatus includes; a housing accommodating a concave mirror disposed on a reference axis; and a display disposed outside the housing and out of the reference axis for projecting a target light flux onto the concave mirror. The concave mirror is configured to reflect the target light flux output from the display toward an examinee's eye along the reference axis.

Abstract: A lens meter comprises: a measurement optical system including a light source, a measurement target plate, a light receiving sensor, a lens table having an opening where a measurement optical axis of the measurement optical system passes; a frame support member including a frame support plate that contacts a left and right rim of a spectacle frame, and the frame support plate moved toward the lens table by a guide mechanism. The frame support member further including: a cutout portion in the frame support plate that allow the lens, placed on the lens table, to measure a point near an edge of the lens, the edge located on the frame support plate side. A pad contacts and prevents the rim from entering the cutout portion, the pad provided in at least a part of the cutout portion; and a pad moving mechanism to move the pad from the contact surface.

Abstract: An optometer for subjectively examining refractive power of an examinee's eye, comprises: a phoropter which selectively disposes an optical element in front of the examinee's eye; a controller having a switch panel for transmitting a signal to the phoropter and a horizontally extending rotation axis; a display rotatable about the rotation axis of the controller, orientation of the display being changeable by its rotation between a side with the switch panel and a side without the switch panel; and a control part which controls a display screen of the display to appear in a constant orientation irrespective of whether the display is reversed upside down by its rotation.

Abstract: A visual acuity testing apparatus capable of performing visual acuity testing under substantially uniform conditions even when a test distance and an installation distance vary has a projection optical unit including a disk whereon a chart is placed, an illumination light source, and variable projection lenses which are moved so as to change an image-forming position and an image size of an image of the chart, an input unit into which an installation distance between the screen and the visual acuity testing apparatus and a test distance between the screen and an examinee are inputted, a projection lens driving unit which moves the variable projection lenses based on the installation distance and the test distance, and a light intensity adjusting unit which adjusts light intensity based on the installation distance and the test distance so that brightness of the chart image falls within a predetermined reference range.

Abstract: A visual acuity testing apparatus capable of performing visual acuity testing under substantially uniform conditions even when a test distance and an installation distance vary has a projection optical unit including a disk whereon a chart is placed, an illumination light source, and variable projection lenses which are moved so as to change an image-forming position and an image size of an image of the chart, an input unit into which an installation distance between the screen and the visual acuity testing apparatus and a test distance between the screen and an examinee are inputted, a projection lens driving unit which moves the variable projection lenses based on the installation distance and the test distance, and a light intensity adjusting unit which adjusts light intensity based on the installation distance and the test distance so that brightness of the chart image falls within a predetermined reference range.

Abstract: 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 the form of an optical signal to the lens chamber units to selectively dispose the optical elements in the test window, the transmitting part being adapted to widen an extent of diffusion of luminous flux of the optical signal more greatly in a forward to upward directions than in a lateral direction.

Abstract: An optometer for subjectively examining refractive power of an examinee's eye, comprises: a phoropter which selectively disposes an optical element in front of the examinee's eye; a controller having a switch panel for transmitting a signal to the phoropter and a horizontally extending rotation axis; a display rotatable about the rotation axis of the controller, orientation of the display being changeable by its rotation between a side with the switch panel and a side without the switch panel; and a control part which controls a display screen of the display to appear in a constant orientation irrespective of whether the display is reversed upside down by its rotation.

Abstract: 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 the form of an optical signal to the lens chamber units to selectively dispose the optical elements in the test window, the transmitting part being adapted to widen an extent of diffusion of luminous flux of the optical signal more greatly in a forward to upward directions than in a lateral direction.

Abstract: A visual function test apparatus for testing a visual function by presenting an optotype to an examinee's eye is disclosed. This apparatus includes a first half mirror disposed on a projection optical axis of light of the optotype; an illumination light source having a projection optical axis which is made substantially coaxial with the projection optical axis of the optotype light by the first half mirror; a concave mirror which reflects an illumination light from the illumination light source and the optotype light; a second half mirror disposed between the first half mirror and the concave mirror, the second half mirror reflecting the optotype light and the illumination light both reflected by the concave mirror toward the examinee's eye; and a control section which changes a ratio between a light quantity of the optotype light and a light quantity of the illumination light in accordance with a predetermined contrast ratio.

Abstract: A visual acuity examination apparatus for examining a visual acuity of an examinee by presenting an optotype to the examinee includes an optotype presenting unit which selectively presents at least one of a plurality of comparison optotypes expressed in geometrical series, the optotypes being provided to be plural in number for each visual acuity value, an input unit with which a distinction answer of the examinee with respect to the presented optotype is input, a storage unit in which an examination program which sequentially determines an optotype to be next presented based on whether the distinction answer with respect to the presented optotype is right or wrong is stored, a control unit which controls the optotype presenting unit in accordance with the examination program, and a processing unit which determines a visual acuity value of the examinee from a percentage of right answers in the distinction answers with respect to an optotype for a visual acuity value.

Abstract: A visual acuity testing apparatus comprises a casing having at least one test window which an examinee looks into, and at least one optotype presented inside the casing which is disposed in such a position that its optotype plane is tilted relative to a datum plane orthogonal to an axial line connecting the test window to an optotype presentation position in order to prevent that light entered through the test window and reflected from the optotype plane, passes through he test window again.

Abstract: A visual function test apparatus for testing a visual function by presenting an optotype to an examinee's eye is disclosed. This apparatus includes a first half mirror disposed on a projection optical axis of light of the optotype; an illumination light source having a projection optical axis which is made substantially coaxial with the projection optical axis of the optotype light by the first half mirror; a concave mirror which reflects an illumination light from the illumination light source and the optotype light; a second half mirror disposed between the first half mirror and the concave mirror, the second half mirror reflecting the optotype light and the illumination light both reflected by the concave mirror toward the examinee's eye; and a control section which changes a ratio between a light quantity of the optotype light and a light quantity of the illumination light in accordance with a predetermined contrast ratio.

Abstract: A visual acuity examination apparatus for examining a visual acuity of an examinee by presenting an optotype to the examinee includes an optotype presenting unit which selectively presents at least one of a plurality of comparison optotypes expressed in geometrical series, the optotypes being provided to be plural in number for each visual acuity value, an input unit with which a distinction answer of the examinee with respect to the presented optotype is input, a storage unit in which an examination program which sequentially determines an optotype to be next presented based on whether the distinction answer with respect to the presented optotype is right or wrong is stored, a control unit which controls the optotype presenting unit in accordance with the examination program, and a processing unit which determines a visual acuity value of the examinee from a percentage of right answers in the distinction answers with respect to an optotype for a visual acuity value.

Abstract: The present invention provides a lens meter capable of accurately measuring the optical characteristics of a lens including additive diopter and of providing highly reliable data representing the optical characteristics of the lens. The lens meter projects measuring light through a target mark on a lens, focuses an image of the target mark in a target image on a photo-detecting device, and determines the optical characteristics of the lens on the basis of a locus of the target image detected by the photo-detecting device.

Abstract: A lens meter including an illumination light source for illuminating a measurement target, a target projection optical system for projecting the measurement target onto an inspected lens, an observation optical system for observing a focused state of the projected target image and target moving device for moving the measurement target in an optical axis direction or the like to thereby measure a refracting power of the inspected lens on the basis of an amount in which the measurement target is moved in the optical axis direction. This lens meter includes a lens holder for holding the inspected lens substantially parallel to a plane on which the lens meter is installed, and a reflection system optical element for reflecting a measurement light passed through the inspected lens even times so that the measurement light is introduced into the observation optical system.