Extra-fixation system of HRA2 With Ultra-wide-angle Lens in Peripheral Retina

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  • Yamamoto Motoshi
    Department of Ophthalmology, National Hospital Organization Kyoto Medical Center Division of Preventive Medicine, Clinical Research, Institute, National Hospital Organization Kyoto Medical Center
  • Takemura Michiyo
    Department of Ophthalmology, National Hospital Organization Kyoto Medical Center
  • Santou Mitsuru
    Department of Ophthalmology, National Hospital Organization Kyoto Medical Center
  • Ookado Saika
    Department of Ophthalmology, National Hospital Organization Kyoto Medical Center
  • Katou Kei
    Department of Ophthalmology, National Hospital Organization Kyoto Medical Center
  • Imai Daisuke
    Department of Ophthalmology, National Hospital Organization Kyoto Medical Center
  • Yokoyama Junko
    Department of Ophthalmology, National Hospital Organization Kyoto Medical Center
  • Tsuzaki Kokoro
    Division of Preventive Medicine, Clinical Research, Institute, National Hospital Organization Kyoto Medical Center
  • Sakane Naoki
    Division of Preventive Medicine, Clinical Research, Institute, National Hospital Organization Kyoto Medical Center
  • Kita Mihori
    Department of Ophthalmology, National Hospital Organization Kyoto Medical Center Division of Preventive Medicine, Clinical Research, Institute, National Hospital Organization Kyoto Medical Center

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Other Title
  • 超広角レンズを用いたHRA2<sup>®</sup>での周辺網膜撮影用外部固視標の有用性

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<p>[Purpose] We investigated the efficacy of our original external fixation target system in ultra-widefield (UWF) fluorescein angiography (FA) for diabetic patients.</p><p>[Subjects and Methods] Peripheral area capture and obtaining time using our external fixation target system on UWF FA in 36 eyes of 18 diabetic patients were compared with those from verbal instructions instead of our fixation system in 36 eyes of 18 diabetic patients as a control group. Our external fixation target system comprised light-emitting diodes and phosphorescent tape on a board set at a viewing angle of 40° in front of the patient. The peripheral area capture and obtainig time of 4 peripheral areas were compared between our external fixation target system and the control group.</p><p>[Results] The peripheral area captured with our external fixation target system was 2,661,692 ± 453,261 pixels, significantly wider than the 2,102,607 ± 474,800 pixels in the control group (p<0.05). Obtaining time was 50 ± 8 s in our external fixation target system group, significantly shorter than the 79 ± 36 s in the control group (p<0.05).</p><p>[Conclusions] Our external fixation target system on UWF FA seems promising, allowing capture of a wider retinal field in a shorter time.</p>

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