Br J Ophthalmol 92:1061-1064 doi:10.1136/bjo.2008.139568
  • Original Article
    • Clinical science

Initial experience with the Pascal photocoagulator: a pilot study of 75 procedures

Open Access
  1. C Sanghvi1,
  2. R McLauchlan1,
  3. C Delgado1,
  4. L Young1,
  5. S J Charles1,
  6. G Marcellino2,
  7. P E Stanga1
  1. 1
    Manchester Royal Eye Hospital, Manchester, UK
  2. 2
    OptiMedica Corporation, Santa Clara, CA, USA
  1. Mr P E Stanga, Manchester Royal Eye Hospital, Oxford Road, Manchester M13 9WH, UK; retinaspecialist{at}
  • Accepted 14 May 2008
  • Published Online First 27 June 2008


Background: The Pascal is a semiautomated photocoagulator that delivers a pattern array of multiple burns in a rapid predetermined sequence with a single foot pedal depression. Each burn is reduced to 10 or 20 ms to achieve this. The authors report their early experience with this system.

Methods: 75 procedures done in 60 patients divided into four groups—group A, patients undergoing panretinal photocoagulation (PRP); group B, patients undergoing focal or modified grid macular laser; group C, patients undergoing macular grid and group D, patients undergoing retinopexy—were retrospectively studied.

Results: 31/34 procedures in group A, 24/26 procedures in group B, 5/7 procedures in group C and all eight patients in group D had successful outcomes. Significantly higher powers were required with the Pascal than with conventional laser (p<0.001) in eyes that underwent PRP and focal/modified grid macular treatment with both systems. Single session PRP was successfully performed in five patients, and five were successfully treated with a macular grid using pattern arrays only. No adverse events were noted.

Conclusion: Although the shorter pulse duration of the Pascal necessitates the use of a higher power, it is not associated with adverse effects. The results here suggest that the Pascal photocoagulator is safe and effective, and offer several potential advantages related to the brief exposure time.


  • Competing interests: GM is employed by the OptiMedica Corporation and has a proprietary interest in the Pascal Photocoagulator.

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