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June 1983

A Method to Predetermine the Correct Photocoagulation Dosage

Author Affiliations

From the Eye Research Institute of Retina Foundation, Boston.

Arch Ophthalmol. 1983;101(6):949-953. doi:10.1001/archopht.1983.01040010949020

• Relative absorbance in different locations on the retina has been studied by measuring the relative reflectance. Using this measurement it is possible to predetermine the correct dosage of light power in any new location on the retina by comparing the new reflectance with the reflectance in the test location. It is important to measure the reflectance with the aiming beam in its actual setting for application because the absorbance is affected by the angular orientation of the beam. A method is proposed for measuring, when needed, the relative concentration of blood and melanin at different points of the retina.