OPHTHALMIC APPARATUS AND CONTROL METHOD FOR THE SAME, AND PROGRAM

PROBLEM TO BE SOLVED: To provide a mechanism capable of highly accurately measuring the cornea curvature of a subject eye even when the subject eye is an IOL-implanted eye or the like which generates a ghost.SOLUTION: A control method for the ophthalmic apparatus includes: a step (S520) of imaging t...

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Bibliographic Details
Main Author KOMINE ISAO
Format Patent
LanguageEnglish
Japanese
Published 18.05.2015
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Summary:PROBLEM TO BE SOLVED: To provide a mechanism capable of highly accurately measuring the cornea curvature of a subject eye even when the subject eye is an IOL-implanted eye or the like which generates a ghost.SOLUTION: A control method for the ophthalmic apparatus includes: a step (S520) of imaging the anterior eye part of the subject eye with ring light projected on the cornea of the subject eye to obtain an image of the anterior eye part; a step (S530) of detecting a ring image based on the ring light from the image of the anterior eye part; a step (S550) of, when a plurality of ring images are detected by S530, determining from among the plurality of ring images a corneal reflex ring image in which the ring light is reflexed off the cornea; and a step (S560) of obtaining the cornea curvature of the subject eye on the basis of the corneal reflex ring image determined by S550. 【課題】IOL挿入眼などのゴーストが発生する被検眼であっても、その角膜曲率を高精度に測定することができる仕組みを提供する。【解決手段】被検眼の角膜にリング光を投影した状態で被検眼の前眼部を撮像して、前眼部画像を得るステップ(S520)と、前眼部画像から、前記リング光に基づくリング像を検出するステップ(S530)と、S530で複数のリング像が検出された場合に、当該複数のリング像の中から、前記リング光が被検眼の角膜で反射したリング像である角膜反射リング像を判定するステップ(S550)と、S550で判定した角膜反射リング像に基づいて被検眼の角膜曲率を取得するステップ(S560)を有する。【選択図】図5
Bibliography:Application Number: JP20130236199