OPHTHALMOLOGIC MEASURING DEVICE
To acquire a more accurate and more appropriate measurement result.SOLUTION: An ophthalmologic measuring device includes: a measurement optical system for projecting measurement light onto the ocular fundus of an eye to be examined and causing a light receiving element to receive reflection light of...
Gespeichert in:
1. Verfasser: | |
---|---|
Format: | Patent |
Sprache: | eng ; jpn |
Schlagworte: | |
Online-Zugang: | Volltext bestellen |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | To acquire a more accurate and more appropriate measurement result.SOLUTION: An ophthalmologic measuring device includes: a measurement optical system for projecting measurement light onto the ocular fundus of an eye to be examined and causing a light receiving element to receive reflection light of the measurement light from the ocular fundus of the eye to be examined; a conversion member disposed at a pupil conjugate position of the eye to be examined in the measurement optical system for converting the reflection light from the ocular fundus into a measurement index image consisting of a ring image or many point images and causing the light receiving element to receive the measurement index image; anterior eye part image acquisition means for acquiring an anterior eye part image including the pupil of the eye to be examined; and processing means for processing the measurement index image received by the light receiving element, and acquiring eye refractive power information in a measurement region where the measurement index image corresponds to in the pupil. The processing means compares the pupil region in the anterior eye part image with the measurement region corresponding in the pupil so as to detect a vignetting state by a pupillary margin of a measurement light flux that passes through the measurement region, and correct the measurement region for acquiring the eye refractive power information on the basis of a detection result.SELECTED DRAWING: Figure 16
【課題】 より精度よく、より適切な測定結果を得る。【解決手段】 被検眼眼底に測定光を投光し、被検眼眼底からの測定光の反射光を受光素子に受光する測定光学系と、測定光学系における被検眼の瞳共役位置に配置され、眼底からの反射光をリング像又は多数の点像からなる測定指標像に変換して受光素子に受光させる変換部材と、被検眼の瞳孔を含む前眼部像を取得する前眼部像取得手段と、受光素子に受光された測定指標像を処理し、測定指標像が瞳孔上で対応する測定領域における眼屈折力情報を得る処理手段と、を備え、処理手段は、前眼部像における瞳孔領域と、瞳孔上で対応する測定領域と、を比較することで、測定領域を通過する測定光束の瞳孔縁によるケラレ状態を検出し、その検出結果に基づき、眼屈折力情報を得る測定領域を補正する。【選択図】 図16 |
---|