Abstract: A spectacle lens processing device includes a drilling tool and a processor. The processor acquires a position of a hole formed in a lens and a pantoscopic angle. The pantoscopic angle is an angle in a vertical plane between a visual axis of a user and an optical axis of the lens when the user wears spectacles in which the lens after processing is mounted and faces forward. The processor determines, based on the acquired pantoscopic angle, a relative angle between the drilling tool and the lens when the hole is formed in the lens in the position of the hole.

Abstract: An eyeglass frame sizing system includes a frame member, a pair of adjustable rims supported by the frame member, each rim including an indicator for indicating a center of the rim, an adjustable nosepiece supported by the frame member, a pair of adjustable temples each supported by one of the pair of rims and a plurality of sensors for detecting positions of the pair of adjustable rims, the pair of adjustable temples and the adjustable nosepiece.

Abstract: A measurement instrument and its associated method of use to record a pupil center position of a person's eye. The instrument has a chassis and a free swinging assembly that is pivotably attached to the chassis. The swinging assembly has alignment points that remain in a horizontal plane as the swinging assembly swings. The instrument is attached to a set of eyeglass that are worn on that person's head. While wearing the measuring instrument, a person is made to assume a natural head position for a specific activity. Once a natural head position is found, the swinging assembly is set into a locked position. The pupil center point can then be determined by observing the now locked alignment points from a predetermined vantage point.

Abstract: A pupil center determination recorder comprising a guide main body 100 attached to a frame of glasses, a pair of adjusters 200 movably attached to the guide main body 100 and pointers 300 respectively attached to the pair of adjusters 200, wherein the pointer 300 has a first marking section 340A for marking the respective objective pupil centers measured by a measurer of the right and left pupils of a test subject on dummy lenses attached to the frame of the glasses worn by the subject, a second marking section 340B for showing identical marks 342B in front of the subject's right and left pupils and a third marking section 340C for marking by moving adjusters 200 such that the identical marks look like overlapping each other and at a position where the identical marks 342B appear to be superimposed; wherein the first, the second, and the third marking sections can move on the same circumference and be fixed at the same position.

Abstract: A lens holder system for temporarily holding a prescription lens in the openings eyeglass frames having perimeter grooves so that the patient can see what a pair of eyeglass frames will look like on him or her. The system has a plurality of pairs of lens holders. Each lens holder includes a prescription lens, a prescription lens encircling portion, a pair of resilient spring wires fixed at first ends to opposite sides of the prescription lens encircling portion, and a pair of guides positioned on the lens encircling portion distant from the point of attachment of the first ends of the spring wires to the lens encircling portion. The second ends of the spring wires are slidably engaged with one of the guides and the second ends of the spring wires have terminal stops to prevent the spring wires from being withdrawn from the guides.

Abstract: A method for prescribing bifocal spectacles for a person having reduced visual acuity includes placing a trial frame on the face of said person in front of his eyes and measuring a far interpupillary distance when said person is viewing a distant object, placing corrective lenses in said frame until said person views said distant object with acuity, placing high plus lenses in said frame for each eye and moving said right and left trial frame sections towards each other while said person is viewing text at a nearer distance and until said person can read said text with binocular vision and then obtaining a near interpupillary distance from said frame and recording said far and near distances with said far prescription and said high plus diopter to employ said recorded data to fabricate bifocal spectacles for said person from said data. The resulting spectacles are also described.

Abstract: High voltage semiconductor devices include a drift layer region underlying a field gate electrode, the drift layer region having a selected charge density of lesser magnitude than the charge density of the remainder of the drift layer. This tailoring of the charge density of the drift layer region lowers the pinch-off voltage of a MOSFET inherent in the drift layer region. This lower pinch-off voltage decreases the potential of a device buried-layer when the device is in a reverse blocking mode of operation.

Abstract: A pair of trial spectacles for allowing a wearer to test the feeling and effect of a pair of spectacles and lenses before an actual pair is constructed. The trial spectacles include a frame member adapted to be supported on the face of a wearer having at least a first eye rim portion positioned in front of one of the eyes of wearer when the frame member is supported on the face of the wearer. The first rim portion is adapted to removably support a first lens. The first lens is horizontally slidable in the first portion so that the first lens can be horizontally adjusted to meet the wearer's visual requirements.