VISUAL FIELD MEASURING METHOD, VISUAL FIELD MEASURING APPARATUS, AND OPTOTYPE
|Posted date||Mar 29, 2017|
|International application number||2016JP072647|
|International publication number||WO 2017022757|
|Date of international filing||Aug 2, 2016|
|Date of international publication||Feb 9, 2017|
|Title||VISUAL FIELD MEASURING METHOD, VISUAL FIELD MEASURING APPARATUS, AND OPTOTYPE|
[Problem] To provide a visual field measuring method and visual field measuring apparatus which are able to reduce the burden on a tested person and a testing technician, and to provide an optotype that enables minimum separable acuity obtained as a test result to coincide with a retinal resolution, and is suited to automatic measuring and the visual field measuring method and visual field measuring apparatus according to the present invention.
[Solution] This method for measuring the visual field comprises: a reference optotype display step of causing a test optotype to be displayed at a reference position BP located in the center of a display unit 2; a reference input step of causing the tested person to provide an input of the fact that the tested person has recognized the test optotype displayed in the reference optotype display step; a peripheral optotype display step of causing a test optotype to be displayed at a position different from the reference position BP if the fact that the test optotype is recognized is inputted in the reference input step; and a peripheral input step of causing the tested person to provide an input of the fact that the tested person has recognized the test optotype displayed in the peripheral optotype display step. A reaction time from the displaying of the test optotype in the peripheral optotype display step to the input of the fact that the test optotype is recognized in the peripheral input step is measured.
|Outline of related art and contending technology||
The visual function test in the ophthalmology medical, understand the pathological condition of the eye, determine the course of therapy, such as verification of a therapeutic effect in order to obtain an objective determination, an important role. In general, the visual function is tested, the input of the visual information from the eye as a function of the visual acuity, visual field, color vision and the like.
As an example of inspection of the visual acuity of the visual function are generally been performed, the visual acuity and in a broad sense, to recognize the existence of the object, which is the ability to identify what is meant (form-sense). Is the visual acuity (form-sense), 'authorization threshold minimum view', 'minimum separation threshold', 'minimum flexible', 'sub pattern vision' are classified into one of the 4. For measuring the general vision, 'the minimum separation threshold' is measured.
The 'minimum separation threshold' to the measurement of, in general, the Landolt ring is used. Is the Landolt ring, a doughnut-shaped notch in a part of the rear wheels so that it is provided, can recognize the existence of the cut depending on whether the measured minimum separation threshold. More specifically, to show the Landolt rings of different size in a subject can recognize the position of the notch thereof from the size. Then, the minimum size of the notch position in the gap of the notch in the Landolt rings, can be the threshold of a minimum separation of the subject.
In addition, the visual-field examination, glaucoma and retinitis pigmentosa, diabetic retinopathy, retinal detachment, macular degeneration or diseases such as diseases is performed to determine the degree of progression. Such field inspection is, when one point is visible around the visual field range is measured. Specifically, the face of the visual field is fixed, the display unit of the subject within the visual field of the center of the board mark causes shown. In this state, the light around the display appear and the like, when the light is visible, of causing the buzzer to the subject. In this manner, the subject can recognize to which position of the light can be determined by checking whether or not, and the field being examined by the missing portion (http://medical-checkup.info/article/43671142.html http://www.nichigan.or.jp/public/disease/ryokunai _ryokunai.jsp reference).
|IPC(International Patent Classification)|
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 DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JP KE KG KN KP KR 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
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