Ophthalmic Measurement Devices and Ophthalmic Measurement Procedures

一种测量装置、眼科的技术，应用在医药科学、测试眼睛的设备、诊断等方向，能够解决前房OCT装置昂贵、复杂结构等问题

Active Publication Date: 2017-09-26
NIDEK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] When using a Scheimpflug camera to measure the cornea in several meridian directions, the optics should be rotated in order to obtain cross-sectional images at different angles, whereby this setup results in a rather complex structure
Anterior chamber OCT devices are quite expensive due to interferometric optics and optical scanners required for anterior chamber OCT

Method used

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  • Ophthalmic Measurement Devices and Ophthalmic Measurement Procedures
  • Ophthalmic Measurement Devices and Ophthalmic Measurement Procedures
  • Ophthalmic Measurement Devices and Ophthalmic Measurement Procedures

Examples

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Embodiment Construction

[0019] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. First, refer to figure 1 , to describe the schematic structure of the ophthalmic measurement device 1 according to the embodiment.

[0020] figure 1 The shown ophthalmic measurement device 1 measures the corneal posterior surface of the eye E to be examined. Such as figure 1 As shown, the ophthalmic measurement device 1 is provided with a corneum projection optical system 10 , an imaging optical system (light receiving optical system) 20 and a controller 100 . The ophthalmic measurement device 1 of this embodiment has an alignment projection optical system 30 , a second measurement optical system 40 , and a fixed optotype projection optical system 50 . These optical systems are built in a housing not shown in the drawings. A very well-known alignment movement mechanism moves the housing three-dimensionally relative to the subject's eye. For example, th...

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Abstract

There is provided an ophthalmic measurement apparatus 1 including: a keratoscopic projection optical system 10 that projects a pattern target toward a cornea Ec of a subject eye E; and an imaging optical system 20, the imaging device 27 of which captures second Purkinje images Rp1 and Rp2 that are target images formed due to the pattern target being reflected from a posterior corneal surface of the subject eye E. In the ophthalmic apparatus 1, a controller 100 executes a process (S9) of detecting the second Purkinje images Rp1 and Rp2 based on an imaging signal output from the imaging device 27, and an anterior chamber information acquisition process (S10) of acquiring information of the posterior corneal surface of the subject eye E based on the detected result of the detecting process.

Description

[0001] Cross References to Related Applications [0002] This application claims priority from Japanese Patent Application No. 2013-248476 filed on November 29, 2013, the entire contents of which are hereby incorporated by reference. technical field [0003] The present disclosure relates to an ophthalmic measurement device, an ophthalmic measurement method, and an ophthalmic measurement program for measuring an eye to be examined. Background technique [0004] The posterior surface of the cornea, for example, the curvature and shape of the posterior surface of the cornea can be measured as ophthalmic properties of the eye being examined. For example, the curvature of the posterior surface of the cornea is used to calculate the corneal refractive power, and the result of the calculation is used to calculate the intraocular lens power. Typically, properties of the posterior surface of the cornea are obtained by analyzing cross-sectional images of the cornea captured using de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B3/107A61B3/10
CPCA61B3/107A61B3/1005A61B3/14A61B3/152
Inventor 泷井通浩河合规二
Owner NIDEK CO LTD
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