TOP > 外国特許検索 > OPHTHALMIC EXAMINATION DEVICE AND OPHTHALMIC EXAMINATION METHOD

OPHTHALMIC EXAMINATION DEVICE AND OPHTHALMIC EXAMINATION METHOD NEW

外国特許コード F190009748
整理番号 (S2017-0815-N0)
掲載日 2019年5月7日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2018JP022492
国際公開番号 WO 2018230582
国際出願日 平成30年6月12日(2018.6.12)
国際公開日 平成30年12月20日(2018.12.20)
優先権データ
  • 特願2017-118382 (2017.6.16) JP
発明の名称 (英語) OPHTHALMIC EXAMINATION DEVICE AND OPHTHALMIC EXAMINATION METHOD NEW
発明の概要(英語) Provided is an ophthalmic examination device including: an image receiving means for receiving an image containing at least one of a line and a shape in a visual field region centered at a fixation point, drawn by a subject; and an evaluating means for evaluating a degree of image distortion of the subject on the basis of the image received by the image receiving means.
従来技術、競合技術の概要(英語) BACKGROUND ART
From the outside of the visual information obtained from the 80%, the visually impaired is that serious problems arise in the user's life. Such visual disorder there are various types, the object is distorted and distortion on the life variable view becomes a serious trouble in viewing. Viewed as the main cause of the distortion and magnification view, the position of the center of the retinal macular retina before the abnormality occurs in the film, such as a disease-related macular degeneration. These diseases are the development increases with age, a large problem in society.
If the disease to the macula, visual cell or an external disturbance by a regular array of nodes, and between the central view of the world have established a precise spatial correspondence is disturbed. As a result, the shape of an object than the actual value appears deformed. Such a user with impaired vision according to the variable referred to as a view.
The view change becomes worse the distortion of the field of view, both the deviation of the image of the eye is increased, a strong sense of incongruity in the field. In addition, distortion of the view by the shape of the object cannot be recognized accurately, often feel inconvenience in the daily life. The view magnification of the visual function in this manner the quality of the important factors. Therefore, if aware of the distortion in the field of disease or the macula is generated, according to view change is necessary to consult the inspection whether or not.
The absence of the magnification of the viewed as a simple method, for example, as shown in Fig. 1, an inspection method called amsler chart is (Amsler Chart). The amsler chart is the mass of the breadth of the lattice 20 and the look-up table, each line 1 drawn at intervals the spacing between the viewing angle, viewing of the subject 10 to a qualitative assessment of the abnormality degree that occur within the field of view. The distance from the inspection subject by a drawing-up table 30cm in the center of the black solid view, line distortion, the size of the grid, to check the sense of incongruity, can be examined qualitatively the presence or absence of the use of the view change. Such a modified example of the amsler chart has been proposed (for example, see Patent Document 1).
In addition, the degree of the progression variable view as a method for evaluating quantitatively, as shown in Fig. 2, chart M- ((registered trademark) M-CHARTS) inspection method is called. M- Chart, the chart and a plurality of dotted lines, the intervals for each of the individual are different from each other by a dotted line. In this M- changing the view point of the patient's chart according to the dotted line show the order from the value in the small space, a narrow point is distorted by a dotted line interval, the interval between the point spread does not perceive the distortion. Change as the progress of the symptoms of view, distortion is not larger than the distance between the point of perception is not lost. By this property, the degree of the progression variable view can be examined quantitatively. M - such variations and applications of the chart has been proposed (for example, see Patent Document 2).
The view is variable, is not negligible in daily life from, and eye shielding is needed to be various degrees (for example, see Non-Patent Document 1). Therefore, only the presence of a change only to the use of the view would be insufficient, the variation of the patient to quantify the extent of view needs to be evaluated.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • UNIVERSITY OF YAMANASHI
  • 発明者(英語)
  • KASHIWAGI, Kenji
  • MAO, Xiaoyang
  • TOYOURA, Masahiro
  • AKAZAWA, Kazuya
国際特許分類(IPC)
指定国 National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
上記の特許・技術に関心のある方は、下記問合せ先にご相談下さい。

PAGE TOP

close
close
close
close
close
close