US 5,844,661 A · Ophthalmic apparatus

Abstract

An objective refraction measuring system of an ophthalmic apparatus measures a refractive power of an eye to be examined in an objective manner under the condition that a gazing chart of a gazing target system is fixed to the eye to be examined. An arithmetic-logic unit obtains an objective measurement value of the eye to be examined on the basis of the measurement result by the objective refraction measuring system and the gazing target system. A control unit controls a continuous objective measurement while fogging the gazing chart after setting the gazing chart of the gazing chart system to a far-sight position of the eye to be examined which is obtained by using the gazing target system. With such measurement, the continuous objective measurement values by fogging the gazing chart of the gazing target system is obtained from the far-sight position based upon the objective measurement of the eye to be examined. Thus, the limit of the adjustment force of the eye to be examined is precisely measured.

Claims8

Dependent claims

An ophthalmic apparatus comprising:

an objective refraction measuring system for measuring a refractive power of an eye to be examined in an objective manner;
a gazing target system having a gazing chart fixed to the eye;
means for detecting a far-sight position of the eye by the gazing target system;
and
fogging means for setting the gazing chart to the detected far-sight position and fogging the set gazing chart,
wherein a continuous objective measurement is performed by the objective refraction measuring system while fogging the set gazing chart by the fogging means.

3 more elements

Dependencies are inferred from the claim text.

Ophthalmic apparatus

Life of this patent

Ophthalmic apparatus

Life of this patent

Abstract

Claims8