The Journal of Japan Society for Laser Surgery and Medicine
Online ISSN : 1881-1639
Print ISSN : 0288-6200
ISSN-L : 0288-6200
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Volume 18, Issue 3
Displaying 1-8 of 8 articles from this issue
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  • Role of a Scanning Laser Ophthalmoscope in Understaning of Fundus Diseases and Therapies
    Kunihiko SHIRAKI, Yukio TAKAMINE, Takeya KHONO, Mitsuyasu MORIWAKI, To ...
    1997 Volume 18 Issue 3 Pages 1-10
    Published: 1997
    Released on J-STAGE: September 24, 2012
    DOIhttps://doi.org/10.2530/jslsm1980.18.3_1
    JOURNAL FREE ACCESS
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    Advantages of a scanning laser ophthalmoscope enabled us to perform three studies:(1) monochromatic light observation on choroidal nevi,(2) digital limage analysis on indocyanine green angiograms of central serous chorioretinopathy,(3) microperimetry for retinal sensitivity over drusen. Choroidal nevi were clearly observed using a diode laser as a light source and dark field observation. Delay in choroidal perfusion was digitally confirmed in central serous chorioretinopathy. Retinal sensitivity was significantly decreased over drusen. Multifunctional characteristics of a scanning laser ophthalmosope was considered to contribute to analysis of changes in ophthalmoscopic appearance, circulation disturbance and visual functions.
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  • Three-dimensional Evaluation of Changes in the Optic Nerve Head and Fundus by Means of Scanning Laser Tomography
    Goji TOMITA, Hideya UCHIDA, Hiroshi ANDO
    1997 Volume 18 Issue 3 Pages 11-16
    Published: 1997
    Released on J-STAGE: September 24, 2012
    DOIhttps://doi.org/10.2530/jslsm1980.18.3_11
    JOURNAL FREE ACCESS
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    By moving the focal plane along the optical axis, the scanning laser tomograph had the advantage of ability to evaluate the optic nerve head configuration layer by layer, It also enabled to reconstruct tomographical images three-dimensionally to calculate the topographic parameters, which was useful to diagnose glaucoma, In addition, deetailed assessment of changes around the macular region was possible.
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  • Ocular Fundus Blood Flow Measurement Using Laser Speckle Circulation Analyzer
    Yasuhiro TAMAKI
    1997 Volume 18 Issue 3 Pages 17-21
    Published: 1997
    Released on J-STAGE: September 24, 2012
    DOIhttps://doi.org/10.2530/jslsm1980.18.3_17
    JOURNAL FREE ACCESS
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    We have developed an apparatus using the laser speckle phenomenon for noninvasive two-dimensional measurements of the fundus tissue circulation. The normalized blur of the speckle pattern (NB value) was adopted as an index of blood veloity in the tissue. Diode laser (wavelength 808nm) was used for the measurement of tissue cirulation in choroid or optic nerve head, while argon laser (wavelength 488nm) was used for that in retina. At various levels of intraocular pressure in rabbits, NB in choroid or retina showed a significant correlation with the blood flow rate in choroid (r=0.60, p<0.001) or retina (r=0.59, p<0.001), respectively. These results indicated that the NB value can be used as a quantitative index not only for the blood velocity but also for the blood flow rate in the tissue.
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  • Laser Refractive Surgery
    Shigeru KINOSHITA, Mitsutoshi ITO
    1997 Volume 18 Issue 3 Pages 23-29
    Published: 1997
    Released on J-STAGE: September 24, 2012
    DOIhttps://doi.org/10.2530/jslsm1980.18.3_23
    JOURNAL FREE ACCESS
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    Laser refractive surgeries using the ArF excimer laser, a frequency-quinrupled Nd: YAG laser, a picosecond Nd: YLF laser, a Ho: YAG laser, and an Er: YAG laser are reviewed. For each type of the laser, the interaction with corneal tissne is discussed. Also, their history of laboratory and clinical studies are described. Although excimer laser PRK is the only practical modality so far available in the clinical setting, the other lasers may also be available in the near future with further research and development.
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  • Photodynamic Therapy for Ocular Diseases
    Keisuke MORI, Shin YONEYA
    1997 Volume 18 Issue 3 Pages 31-36
    Published: 1997
    Released on J-STAGE: September 24, 2012
    DOIhttps://doi.org/10.2530/jslsm1980.18.3_31
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    Choroidal neovascularization (CNV) is a leading cause of new blindness due to age-related macular degeneration. The currently available treatment for CNV is thermal laser photocoagulation, which causes full-thickness retinal damage and can lead to visual loss. Photodynamic therapy may offer selective targeting to tissues in which sensitizers accumulate without damaging surrounding tissues. One of the second generation sensitizer: mono-l-aspertyl chlorin e6 (NPe6) has advantages of low skin photosensitization, major absorption peak at far-red light, rapid tissue uptake/clearance with hydrophilic nature and high photosensitizing ability. We improved diode laser delivery system that emits maximum absorption peak of NPe6 for ophthalmological application. Then, we treated experimental CNV by photodynamic therapy with NPe6 and demonstrated selective occlusion of CNV. This encouraging result suggest that photodynamic therapy with NPe6 may be safe and beneficial for the treatment of age-related macular degeneration.
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  • New laser therapy for glaucoma
    Tetsuya YAMAMOTO
    1997 Volume 18 Issue 3 Pages 37-41
    Published: 1997
    Released on J-STAGE: September 24, 2012
    DOIhttps://doi.org/10.2530/jslsm1980.18.3_37
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    The author outlined two newly developed methods of laser therapy for glaucoma, namely, selective laser trabeculoplasty and endoscopic cycloablation. Selective laser trabeculoplasty functions based on 'selective targeting of trabecular meshwork cells' and reduces outflow resistance of the trabecular meshwork. Preliminary results are encouraging with good pressure control and less frequent complications. Endoscopic cycloablation enables us to quantitatively treat ciliary processes under a direct view. This technique is suitable for an adjunctive measure to surgery combined with vitrectomy or cataract extraction. These two therapeutic modalities are expected to add a new choice to the present glaucoma therapy.
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  • Computer Aided Surgery and LASER
    Hiroshi ISEKI, Kyoujiro NAMBU, Ichiro SAKUMA, Takeyoshi DOHI, Kensuke ...
    1997 Volume 18 Issue 3 Pages 43-48
    Published: 1997
    Released on J-STAGE: September 24, 2012
    DOIhttps://doi.org/10.2530/jslsm1980.18.3_43
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    The minimally invasive surgery aims not to do a large and hazardous surgery and to do a small dissection only for necessary part of the disease. The minimally invasive surgery is based on preoperative planning and intraoperative navigation system. The purpose of computer aided surgery would assit for the strategy system for minimally invasive surgery by the integration of medical images and advanced tools. The strategy system in future is an application of this system (computer aided micro-multichannel-manipulator: CM cube) for the automatic-surgery with the development of a micromanipulator. Telesurgery and finer surgery by micromachine will be possible to perform by using the robotics technology of micromanipulator.
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  • [title in Japanese]
    1997 Volume 18 Issue 3 Pages 49-51
    Published: 1997
    Released on J-STAGE: September 24, 2012
    DOIhttps://doi.org/10.2530/jslsm1980.18.3_49
    JOURNAL FREE ACCESS
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