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Br J Ophthalmol 2000;84:1053-1055 doi:10.1136/bjo.84.9.1053
  • Scientific correspondence

Real time fixation point monitoring system for photocoagulation of juxtafoveal neovascularisation

  1. Seiyo Harinoa,
  2. Yoshiko Iwahashia,
  3. Yusuke Oshimab,
  4. Miki Sawaa,
  5. Hirokazu Nakamurac
  1. aDepartment of Ophthalmology, Yodogawa Christian Hospital, Osaka, Japan, bDepartment of Ophthalmology, Osaka University Medical School, Suita-City, Japan, cNidek Co, Ltd, Gamagori, Japan
  1. Dr Harino, Department of Ophthalmology, Yodogawa Christian Hospital, 2-9-26 Awaji, Higashiyodogawa-ku, Osaka 533-0032, Japansharino{at}jb3.so-net.ne.jp
  • Accepted 13 April 2000

Abstract

BACKGROUND/AIMS A new real time monitoring system has been developed to locate the fixation point during juxtafoveal laser photocoagulation.

METHOD The red diode laser beam is combined coaxially with the illumination beam to image a cross in the focal plane of the slit lamp, which allows projection of a red cross onto the patient's fundus. 27 patients with juxtafoveal choroidal neovascularisation were treated by photocoagulation using this system.

RESULTS 13 (48%) patients whose visual acuity ranged from 20/200 to 20/40 answered that it was easier to keep the focus on the cross target image than on the aiming beam. The patient maintained stable fixation throughout the treatment. The laser treatment was completed without foveal damage near the fixation point in all patients.

CONCLUSION The real time fixation monitoring system should allow surgeons to treat juxtafoveal lesions with laser photocoagulation more safely and accurately.

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