Keratometer

Details Keratometer Keratometer

1983-04-01

1986-07-01

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351205, 351221, A61B 310

Patent

active

045976481

ABSTRACT:
An improved keratometer instrument capable of measuring keratometric values of an eye is provided. An optical reference of a predetermined dimensional value is directed at the cornea of the eye and an optical sensor measures the same at different meridians. A computer circuit can determine whether the instrument is de-centered or de-focused relative to the eye and can derive measurements of keratometric values. The axis of astigmatism can be visually displayed to the surgeon during an operation.

REFERENCES:
patent: 4157859 (1979-06-01), Terry
patent: 4429960 (1984-02-01), Mocilac et al.
Troutman et al., The Use and Preliminary Results of the Troutman Surgical Keratometer in Cataract and Corneal Surgery, vol. 83, Apr. 1977, Transcripts Amer. Acd. of Opth. & Otol.
Halberg et al., A New Autokeratometer, vol. 8, No. 3, Contact Lens, Sep. 1982.
Smirmaul, The Smirmaul Quantitative Surgical Keratometer, Feb. 1983.

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