Eye measurement apparatus
AssigneeNidek Co., Ltd.
InventorsKenji Nakamura, Mitsuhiro Gono
Life of this patent
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Abstract
An eye measurement apparatus includes: a subjective measurement optical system configured to subjectively measure an examinee's eye, the subjective measurement optical system including: a chart to be presented to the examinee's eye; and a glare light source for irradiating the examinee's eye with a glare light; and a control part configured to determine presence or absence of opacity in a light transmitting part of the examinee's eye and, when the presence of opacity is determined, to allow display of necessity for a glare test which is a subjective measurement to be performed in a state that the examinee's eye is irradiated with the glare light.
Claims19
An eye refractive power measurement apparatus comprising:
- a subjective measurement optical system configured to subjectively measure an examinee's eye, the subjective measurement optical system including:
- a chart to be presented to the examinee's eye;
- and
- a glare light source for irradiating the examinee's eye with a glare light;
- an objective measurement optical system to objectively measure an eye refractive power of the examinee's eye, the objective measurement optical system including:
- a light projecting optical system for projecting a measurement light toward a fundus of the examinee's eye;
- and
- a light receiving optical system including a light receiving device for receiving a fundus reflection light obtained by reflecting the measurement light by the fundus;
- and
- a control part configured to determine presence or absence of opacity in a light transmitting part of the examinee's eye based on a light receiving signal obtained by the fundus reflection light and, when the presence of opacity is determined, to allow display of necessity for a glare test which is a subjective measurement to be performed in a state that the examinee's eye is irradiated with the glare light.
An eye refractive power measurement apparatus comprising:
- a subjective measurement optical system configured to subjectively measure an examinee's eye, the subjective measurement optical system including:
- a chart to be presented to the examinee's eye;
- and
- a glare light source for irradiating the examinee's eye with a glare light;
- an objective measurement optical system to objectively measure an eye refractive power of the examinee's eye, the objective measurement optical system including:
- a light projecting optical system for projecting a measurement light toward a fundus of the examinee's eye;
- and
- a light receiving optical system including a light receiving device for receiving a fundus reflection light obtained by reflecting the measurement light by the fundus;
- and
- a control part configured to determine presence or absence of opacity in a light transmitting part of the examinee's eye based on a light receiving signal obtained by the fundus reflection light and, when the presence of opacity is determined, to control the subjective measurement optical system to execute a glare test which is a subjective measurement to be performed in a state that the examinee's eye is irradiated with the glare light.
An eye measurement apparatus comprising:
- a subjective measurement optical system configured to subjectively measure an examinee's eye, the subjective measurement optical system including:
- a chart to be presented to the examinee's eye;
- and
- a glare light source for irradiating the examinee's eye with a glare light;
- a control part configured to determine presence or absence of opacity in a light transmitting part of the examinee's eye;
- and
- a memory unit comprising the determination result indicating the presence or absence of opacity, wherein
- when the memory comprises the determination result indicating the presence of opacity, the control part controls the subjective measurement optical system to execute a glare test which is a subjective measurement to be performed in a state that the examinee's eye is irradiated with the glare light.
Dependencies are inferred from the claim text.