Abstract:
PURPOSE:Photodynamic therapy provides occlusion of choroidal neovascularization by intravascular endothelial damage. The photodynamic approach offers the potential to occlude choroidal neovascularization selectively without altering adjacent sensory retina and therefore to preserve visual acuity. To determine the selectivity of photodynamic therapy photoreceptor function was measured by microperimetry allowing topic mapping of retinal function. METHODS:A Rodenstock scanning laser ophthalmoscope was used to document preservation of central visual fields before and after photodynamic therapy. Single photodynamic therapy without known efficient parameters was performed in 13 patients and repeated photodynamic therapy using optimised light doses was performed in 10 patients with subfoveal choroidal neovascularization using benzoporphyrin derivate (verteporfin). Intensity and dimension of central scotomas were measured, using a grading system of stimuli ranging from 0-32 dB. Areas of absolute and relative defect were defined and fixation localisation was monitored. Perimetric testing was done pre photodynamic therapy, one week, one month and three months post photodynamic therapy. RESULTS:Postoperative scotomas after single photodynamic therapy were smaller in 8%, identical in 61% and larger in 31% compared with preoperative findings. After repeated photodynamic therapy postoperative scotomas were smaller in 70%, identical in 30% and larger in no case. The observed increase was less than 25% of the original size. Postoperative defects were always significantly smaller than the entire size of the irradiated area. No new scotomas were found after photodynamic therapy. Angiographically visible occlusion post photodynamic therapy was in general larger than scotoma size. CONCLUSION:Documentation of the retinal function by microperimetry after photodynamic therapy of subfoveal choroidal neovascularization shows no new scotoma in the treated area. This can also be documented in the hypofluorescent area around the lesion one week after the treatment. After repeated treatment a reduced scotoma size due to choroidal neovascularization could be seen in 2/3 of the patients after 3 months. No initial vision loss as seen in conventional photocoagulation could be documented after photodynamic therapy.
journal_name
Klin Monbl Augenheilkdjournal_title
Klinische Monatsblatter fur Augenheilkundeauthors
Bunse A,Elsner H,Laqua H,Schmidt-Erfurth Udoi
10.1055/s-2000-10537subject
Has Abstractpub_date
2000-03-01 00:00:00pages
158-64issue
3eissn
0023-2165issn
1439-3999journal_volume
216pub_type
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journal_title:Klinische Monatsblatter fur Augenheilkunde
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journal_title:Klinische Monatsblatter fur Augenheilkunde
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journal_title:Klinische Monatsblatter fur Augenheilkunde
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journal_title:Klinische Monatsblatter fur Augenheilkunde
pub_type: 杂志文章
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journal_title:Klinische Monatsblatter fur Augenheilkunde
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journal_title:Klinische Monatsblatter fur Augenheilkunde
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journal_title:Klinische Monatsblatter fur Augenheilkunde
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journal_title:Klinische Monatsblatter fur Augenheilkunde
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journal_title:Klinische Monatsblatter fur Augenheilkunde
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journal_title:Klinische Monatsblatter fur Augenheilkunde
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journal_title:Klinische Monatsblatter fur Augenheilkunde
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