The effect of laser unit on photodynamic therapy spot size
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Siamak Ansari-Shahrezaei & Susanne Binder & Michael Stur
- چاپ و سال / کشور: 2010
Description
Background To determine the effect of the laser unit on photodynamic therapy (PDT) spot size. Methods A calibrated Gullstrand-type model eye was used for this study. The axial length of the model eye was set to different values ranging from 22.2 to 27.0 mm, and the actual spot size from the laser console was recorded for treating a spot of 4 mm in the center of the artificial fundus using two different laser units (Coherent Opal laser; Coherent Inc, Santa Clara, California, USA and Zeiss Visulas laser; Carl Zeiss Meditec Inc, Dublin, California, USA) and two indirect contact laser lenses (Volk PDT laser lens and Volk Area Centralis lens; Volk Optical Inc, Mentor, Ohio, USA). Results From myopia to hyperopia, the total deviation from the intended spot size was –22.5% to –7.5% (Opal laser and PDT laser lens), and –17.5% to +2.5% (Visulas laser and PDT laser lens), –12.5% to +7.5% (Opal laser and Area Centralis lens), and –7.5% to +10% (Visulas laser and Area Centralis lens). Conclusions The used laser unit has a significant effect on PDT spot size in this model. These findings may be important for optimizing PDT of choroidal neovascular lesions
Siamak Ansari-Shahrezaei & Susanne Binder & Michael Stur Received: 14 May 2010 / Revised: 5 July 2010 / Accepted: 7 July 2010 / Published online: 27 July 2010
