Optoretinogram: optical measurement of human cone and rod photoreceptor responses to light

Mehdi Azimipour, Denise Valente, Kari V. Vienola, John S. Werner, Robert J. Zawadzki, Ravi S. Jonnal

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Noninvasive, objective measurement of rod function is as significant as that of cone function, and for retinal diseases such as retinitis pigmentosa and age-related macular degeneration, rod function may be a more sensitive biomarker of disease progression and efficacy of treatment than cone function. Functional imaging of single human rod photoreceptors, however, has proven difficult because their small size and rapid functional response pose challenges for the resolution and speed of the imaging system. Here, we describe light-evoked, functional responses of human rods and cones, measured noninvasively using a synchronized adaptive optics optical coherence tomography (OCT) and scanning light ophthalmoscopy (SLO) system. The higher lateral resolution of the SLO images made it possible to confirm the identity of rods in the corresponding OCT volumes.

Original languageEnglish (US)
Pages (from-to)4658-4661
Number of pages4
JournalOptics Letters
Issue number17
StatePublished - Sep 1 2020

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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