Transscleral infrared laser retinal photocoagulation experimental study under low visibility conditions

Retinal photocoagulation under poor visualization condition is often required. Transscleral infrared laser can be used as an alternative to regular transpupillary treatment. Based upon retinographic measurements, we proposed to estimate the reproducibility as well as ocular wall permeability rate fo...

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Bibliographic Details
Published in:Arquivos brasileiros de oftalmologia 2008-05, Vol.71 (3), p.342
Main Authors: Goulart, Dario Grechi, Sano, Ronaldo Yuti, Cursino, Sylvia Regina Temer, Takahashi, Walter Yukihiko
Format: Article
Language:Portuguese
Subjects:
Analysis of Variance
Animals
Dose-Response Relationship, Radiation
Laser Coagulation - methods
Laser Coagulation - standards
Male
Models, Animal
Pupil - radiation effects
Rabbits
Reproducibility of Results
Retina - injuries
Retina - pathology
Retina - radiation effects
Retina - surgery
Sclera - surgery
Time Factors
Vision, Ocular - physiology
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Summary:Retinal photocoagulation under poor visualization condition is often required. Transscleral infrared laser can be used as an alternative to regular transpupillary treatment. Based upon retinographic measurements, we proposed to estimate the reproducibility as well as ocular wall permeability rate for this treatment. Our primary goal was to evaluate whether this technique can deliver adequate photocoagulation at predetermined parameters without direct retinal visualization. In New Zealand pigmented rabbits, optimal transscleral infrared diode laser settings were administered to the right eye. With the same parameters, transpupillary photocoagulation was repeated in the left eye. Retinographic and clinical examinations were performed immediately and two months later. Ocular wall permeability rate varied between 58.95 and 63.87%. Average permeability using a power of 300 mW (63.14%) was found to be higher than that encountered before its enhancement up to 500 mW (59.11%), (P
ISSN:0004-2749
DOI:10.1590/S0004-27492008000300007