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G.A. Corrales, T. Friberg, S.K. Kurup; Monitoring the Placement of Panretinal Laser Photocoagulation in a Teaching Hospital Using the Optos Panoramic 200 . Invest. Ophthalmol. Vis. Sci. 2006;47(13):971.
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To determine in a feasibility study whether panretinal laser placement can be assessed with a single ultrawide (200°) fundus image. The Optos Panoramic 200TM utilizes Scanning Laser Ophthalmoscope technology to effectively capture ultra–wide field, high resolution images (2000x2000 pixels) of the retina.
Ten consecutive patients (10 eyes) underwent ultrawide angle imaging after receiving conventional panretinal photocoagulation by various laser surgeons at least 2 weeks previously. In a masked manner, these images were assessed by an independent observer to determine whether photocoagulation was complete. We deemed treatment to be complete if we could detect 1,100 +/– 100 laser spots distributed evenly across the entire 200–degree Optos picture. Patients who had vitreous hemorrhage were excluded.
In 4 out of 10 patients, areas of inadequate treatment, sometimes called "skip areas," could be identified. The average number of lesions in eyes deemed fully treated was 998 with a standard deviation of 74.6. In cases where treatment was deemed inadequate on imaging and/or clinical basis, additional photocoagulation was performed.
Ultrawide angle imaging using the Optos P200 may have a special value in the monitoring of the completeness of PRP in a teaching institution. Skip areas can be easily demonstrated in a subjective manner to allow an accurate description of exactly where additional treatment should be directed if needed
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