Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1998-08-25
1999-07-20
Mai, Huy
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351160R, 351177, A61B 310, G02C 704
Patent
active
059262524
ABSTRACT:
An optical diagnostic apparatus for measuring toric contact lens rotation comprising a slit lamp optical instrument including a light source, a slit light projector for projecting a beam of light, and a slit light rotator for rotating the beam of light, a patient head retainer in alignment with the projector to project a slit light beam from the projector onto the eye of a patient and a contact lens on the eye, a slit light rotator actuator for the slit light rotator, for rotating the projected slit light over a range of angles onto the patient's eye and the contact lens thereon, a gravity responsive angle indicator and/or electronic indicator at the slit light rotator, and an arcuate angle scale rotatable with the slit light rotator and cooperable with the indicator to indicate angle of rotation of the angle scale and rotator, whereby the contact lens toric angle can be observed for determining the toric contact lens prescription.
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Life-Link Slope Meter, Life-Link International of Jackson Hole, Wyoming, .COPYRGT.1980.
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