Oximetry and blood flow in the retina

P. Lemaillet, A. Lompado, D. Duncan, Q. D. Nguyen, J. C. Ramella-Roman

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We present the development of setup composed of a retinal oximeter and a blood velocimeter implemented on a regular fundus ophthalmoscope. The oximeter part can acquire nine wavelength-dependent sub-images of the patient fundus in a single snapshot. The fundus image is projected on a large format CCD by an array of nine lenses and wavelength selection is provided by a filter array. Higher wavelength images help establishing melanin absorption, which is further extrapolated to shorter wavelength and subtracted from the absorption images. The remaining shorter wavelength subimages are used measure the oxygen saturation in the retina by fitting oxy- and deoxy-hemoglobin absorption curves. The setup was calibrated with optical phantoms of know optical properties. The velocimeter part of the setup relies on following clusters of erythrocytes to assess the velocity of blood.

Original languageEnglish (US)
Title of host publication26th Southern Biomedical Engineering Conference SBEC 2010
Number of pages4
StatePublished - 2010
Event26th Southern Biomedical Engineering Conference, SBEC 2010 - College Park, MD, United States
Duration: Apr 30 2010May 2 2010

Publication series

NameIFMBE Proceedings
Volume32 IFMBE
ISSN (Print)1680-0737


Conference26th Southern Biomedical Engineering Conference, SBEC 2010
Country/TerritoryUnited States
CityCollege Park, MD


  • Oxygen saturation
  • blood flow
  • spectroscopy

ASJC Scopus subject areas

  • Bioengineering
  • Biomedical Engineering


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