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Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy (oSLO) and Optical Coherence Tomography (OCT)
Published on: August 4, 2018
Variable optical activation of human cone photoreceptors visualized using a short coherence light source
Jungtae Rha1, Brett Schroeder, Pooja Godara
1Department of Ophthalmology, Medical College of Wisconsin, 925 North 87th Street,Milwaukee, Wisconsin 53226, USA. jrha@mcw.edu
Optics Letters
|December 18, 2009
Summary
Short coherence length light imaging reveals light-evoked cone photoreceptor oscillations in over 80% of cones. This technique may help assess cone function in retinal diseases.
Area of Science:
- Ophthalmology
- Neuroscience
- Biomedical Imaging
Background:
- Optical oscillations in cone photoreceptors are detectable after visible light stimuli.
- Previous methods using long coherence length light or short coherence length light in limited cones have shown these oscillations.
Purpose of the Study:
- To investigate the capability of short coherence length imaging to detect light-evoked cone photoreceptor signals.
- To quantify the percentage of activated cones and classify their activation patterns.
Main Methods:
- Utilizing a short coherence length imaging source to stimulate and observe cone photoreceptors.
- Analyzing reflectance signals to detect light-evoked oscillations.
- Classifying cone activation patterns subjectively into four categories.
Main Results:
- Short coherence length imaging revealed light-evoked oscillation signals in a large number of cones.
- Over 80% of cones in a retinal area showed activation (modulation in reflectance signal) after stimulation.
- Distinct patterns of cone activation were observed and could be classified.
Conclusions:
- Short coherence length imaging is effective in detecting light-evoked signals from a high percentage of cone photoreceptors.
- This technique shows promise for in vivo assessment of cone photoreceptor function.
- Potential applications include evaluating retinal health in normal and diseased states.
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