APPARATUS FOR MEASURING OCULAR AXIAL LENGTH
First Claim
1. An apparatus for measuring ocular axial length, comprising:
- a measuring unit having a first irradiating system which irradiates measurement waves onto a fundus of an examinee'"'"'s eye through a cornea of the examinee'"'"'s eye, a first detector which detects reflected waves including waves reflected from the fundus, and a first calculation part which calculates ocular axial length of the examinee'"'"'s eye based on detection signals output from the first detector,wherein the first calculation part acquires reflection information related to an anterior segment of the examinee'"'"'s eye, extracts reflection signals corresponding to a reflection object between the cornea and a posterior capsule of a crystalline lens of the examinee'"'"'s eye based on the acquired reflection information, and determines whether the examinee'"'"'s eye is a phakic eye or an IOL eye based on the extracted reflection signals.
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Accused Products
Abstract
An object of one aspect of the present invention is to obtain a measurement value in accordance with the condition of a crystalline lens of an examinee'"'"'s eye. An apparatus for measuring ocular axial length includes: a measuring unit which irradiates measurement waves toward a fundus of the examinee'"'"'s eye, and calculates the ocular axial length of the examinee'"'"'s eye based on detection signals obtained from reflected waves including waves reflected from the fundus; and a determining unit which acquires reflection information related to an anterior segment of the examinee'"'"'s eye, extracts reflection signals corresponding to a reflection object between a cornea and a posterior capsule of a crystalline lens based on the acquired reflection information, and determines whether the examinee'"'"'s eye is a phakic eye or an IOL eye based on the extracted reflection signals.
28 Citations
10 Claims
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1. An apparatus for measuring ocular axial length, comprising:
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a measuring unit having a first irradiating system which irradiates measurement waves onto a fundus of an examinee'"'"'s eye through a cornea of the examinee'"'"'s eye, a first detector which detects reflected waves including waves reflected from the fundus, and a first calculation part which calculates ocular axial length of the examinee'"'"'s eye based on detection signals output from the first detector, wherein the first calculation part acquires reflection information related to an anterior segment of the examinee'"'"'s eye, extracts reflection signals corresponding to a reflection object between the cornea and a posterior capsule of a crystalline lens of the examinee'"'"'s eye based on the acquired reflection information, and determines whether the examinee'"'"'s eye is a phakic eye or an IOL eye based on the extracted reflection signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification