Micron‐resolution ranging of cornea anterior chamber by optical reflectometry

David Huang, Jyhpyng Wang, Charles P. Lin, Carmen A. Puliafito, James G. Fujimoto

Research output: Contribution to journalArticlepeer-review

129 Scopus citations


Noncontact, high resolution measurements of anterior eye structures using optical coherence domain reflectometry are described. Distances between intraocular structures are measured by directing a beam of short coherence length light onto the eye and performing an interferometric measurement on the optical group delay of reflected signals. Measurements of corneal thickness, corneal excision depth, and anterior chamber depth are demonstrated in vitro, and the location of tissue boundaries is resolved to within ± 2 μm. The full‐width‐half‐maximum longitudinal resolution is 10 μm. Sensitivities to reflected signals as small as 10−10 of the incident power are achieved by heterodyne detection.

Original languageEnglish (US)
Pages (from-to)419-425
Number of pages7
JournalLasers in Surgery and Medicine
Issue number5
StatePublished - 1991
Externally publishedYes


  • anterior chamber depth
  • biometry
  • corneal topography
  • keratorefractive surgery
  • optical ranging

ASJC Scopus subject areas

  • Surgery
  • Dermatology


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