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Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy (oSLO) and Optical Coherence Tomography (OCT)
Published on: August 4, 2018
Accommodation during static retinal imaging with a confocal scanning laser ophthalmoscope.
1Division of Ophthalmology, Children's Hospital and Regional Medical Center, Seattle, Washington 98105-0371, USA. john.kelly@seattlechildrens.org
Ophthalmology
|June 5, 2007
Summary
Dynamic eye accommodation significantly increases during retinal imaging with a confocal scanning laser ophthalmoscope (cSLO). A scanned fixation target did not reliably stabilize accommodation, potentially impacting image accuracy.
Area of Science:
- Ophthalmology
- Optical Imaging
- Retinal Tomography
Background:
- Accommodation, the eye's ability to focus, can introduce errors in optical tomography.
- Confocal scanning laser ophthalmoscopy (cSLO) is sensitive to these dynamic changes.
Purpose of the Study:
- To measure dynamic accommodative responses during cSLO imaging in young adults without cycloplegia.
- To investigate if a scanned fixation target improves accommodative stability during cSLO acquisition.
Main Methods:
- Experimental study involving 4 healthy adult participants (4 eyes).
- Dynamic accommodation measured using an infrared autorefractor.
- cSLO imaging performed under various conditions: with fixation target, without target, darkness, and Snellen chart viewing.
Main Results:
- Accommodation amplitude and variability significantly increased during cSLO imaging.
- Average peak accommodation velocity was 1.37 D/s (max 2.27 D/s).
- Fixation target did not stabilize accommodation; it increased velocity in 3 of 4 subjects.
Conclusions:
- Accommodation exhibits dynamic changes during cSLO image acquisition.
- Scanned fixation targets do not reliably enhance accommodative stability.
- Accommodation-induced errors, estimated up to 813 µm/s, align with observed topographic variability in non-dilated eyes.
