The impact of artificial light scatter on scanning laser tomography

Optometry and Vision Science : Official Publication of the American Academy of Optometry
Mark A BurkeChris Hudson

Abstract

The impact of cataract (which frequently occurs alongside glaucoma) on scanning laser tomography (SLT) is poorly understood. The aim of this pilot study was to determine the impact of artificial light scatter on SLT estimates of optic nerve head (ONH) topography. The sample comprised 10 healthy, young subjects of mean age 23.5 years. One eye of each subject was randomly selected. Cells filled with increasing concentrations of 0.50-microm diameter polystyrene microspheres were prepared. The cells were mounted in front of the objective lens of the Heidelberg Retina Tomograph (HRT) II and were tilted at an angle of 20 degrees to eradicate any surface reflections. Three sets of ONH scans were initially acquired without any light scatter cell in place and then three further sets were acquired for each of four different concentrations of microspheres in a randomized order. The impact of artificial light scatter on cup-to-disc area ratio, cup volume, rim volume, cup shape measure, height variation contour, and mean retinal nerve fiber layer (RNFL) thickness was evaluated. Repeated-measures analysis of variance showed that there was no significant change in cup-to-disc area ratio, cup volume, rim volume, height variation contour, cup s...Continue Reading

References

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Citations

Apr 13, 2007·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Jennifer J HunterMelanie C W Campbell
Apr 13, 2007·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Juan M BuenoMelanie C W Campbell
Sep 24, 2013·Experimental Eye Research·Sunni R PatelRebekka Heitmar

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