Nidek Co., Ltd.

Miwako Hanaki

Naoki Isogai

Akihiro Hayashi

Noriji Kawai

Mikio Kurachi

Toshiya Kobayashi

An ocular accommodative function examination apparatus for examining an accommodative function of an examinee's eye, includes: a fixation target presenting optical system which presents a fixation target at a presenting position to the eye, the presenting position being changeable in a direction of a visual axis of the eye; a refractive power measuring optical system which measures refractive power of the eye; an analysis part which acquires variation or fluctuation in the refractive power of the eye gazing at the fixation target at a certain presenting position within a predetermined time based on a result of measurement by the measuring optical system, and determines tho accommodative function of the eye based on the acquired variation or fluctuation; a display part which displays a result determined by the analysis part; and a control part which controls presenting of the fixation target to perform at least one of simple examination for determining the accommodative function with respect to a first presenting position and thorough examination for determining the accommodative function with respect to a second presenting position, the second presenting position including different positions more than the first presenting position.

Ocular accommodative function examination apparatus

An ocular accommodative function examination apparatus for examining an accommodative function of an examinee's eye, comprises: a fixation target presenting optical system which presents a fixation target at a presenting position to the eye, the presenting position being changeable in a direction of a visual axis of the eye; a refractive power measuring optical system which measures refractive power of the eye and includes a light projecting optical system which includes a light source and projects examination light to a fundus of the eye and a light receiving optical system which includes a light receiving element and receives the examination light reflected from the fundus; an analysis part which acquires variation or fluctuation in the refractive power in a specified measurement meridian direction of the eye gazing at the fixation target at a certain presenting position within a predetermined time based on output of the light receiving element, and determines the accommodative function of the eye based on the acquired variation or fluctuation; an output part which outputs a result determined by the analysis part; and a correcting device which corrects the refractive power determined in the specified measurement meridian direction based on astigmatic power and an astigmatic axis angle when the eye has astigmatism; wherein the analysis part determines the accommodative function based on the corrected refractive power.

An ocular accommodative function examination apparatus for examining an accommodative function of an examinee's eye, comprises: a fixation target presenting optical system which presents a fixation target at a presenting position to the eye, the presenting position being changeable in a direction of a visual axis of the eye; a refractive power measuring optical system which measures refractive power of the eye and includes a light projecting optical system which includes a light source and projects examination light to a fundus of the eye and a light receiving optical system which includes a light receiving element and receives the examination light reflected from the fundus; an analysis part which acquires variation in the refractive power of the eye gazing at the fixation target at a certain presenting position within a predetermined time based on output of the light receiving element, and determines the accommodative function including a range of accommodation and HFC (a frequency of occurrence of a high frequency component of accommodative microfluctuation) of the eye based on an acquired result; and an output part which outputs a result determined by the analysis part, wherein the analysis part determines presence/absence of accommodative constriction and presence/absence of accommodative spasm based on the determined range of accommodation and HFC.

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Gamagori, Japan

Miwako Hanaki