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Related Experiment Video

Updated: May 5, 2026

Author Spotlight: Ex Vivo OCT-Based Multimodal Imaging of Human Donor Eyes for Research into Age-Related Macular Degeneration
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Cation shifts in human retina-choroid.

B J Panessa-Warren1, H W Kraner, K W Jones

  • 1Allied Health Resources, Health Sciences Center, State University of New York, Stony Brook, 11794, Stony Brook, NY.

Biological Trace Element Research
|November 21, 2013
PubMed
Summary

This study analyzed elemental content in human ocular tissues, finding correlations between elements like calcium and zinc and eye morphology. Fresh tissue analysis revealed significant elemental distribution patterns.

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Area of Science:

  • Ophthalmology
  • Trace Element Analysis
  • Biomedical Research

Background:

  • Elemental composition of ocular tissues is crucial for understanding eye health.
  • Previous studies were limited by chemical fixation artifacts.
  • A comprehensive analysis correlating elemental content with various biological factors is needed.

Purpose of the Study:

  • To correlate elemental content and distribution (Ca, Ba, Cr, Cu, Zn, Se) with ocular morphology.
  • To investigate relationships between elemental composition and donor demographics (sex, race, age, birth weight) and health status (diabetes, pathologies).
  • To establish reliable methods for elemental analysis of ocular tissues.

Main Methods:

  • Elemental analysis of 50 human donor eyes using X-ray fluorescence spectrometry (XRF) and proton-induced X-ray emission spectrometry (PIXE).
  • Morphological examination via scanning electron microscopy and light microscopy histochemistry.
  • Analysis of fresh, unfixed ocular tissues to avoid chemical fixation artifacts.

Main Results:

  • Established correlations between specific elemental concentrations and ocular morphology.
  • Identified variations in elemental distribution based on donor characteristics and pathologies.
  • Validated the use of XRF and PIXE for precise elemental mapping in ocular tissues.

Conclusions:

  • Elemental composition of ocular tissues is influenced by morphology, donor factors, and disease states.
  • Analysis of fresh, unfixed tissues provides more accurate elemental data.
  • This research provides a foundation for understanding the role of trace elements in ocular health and disease.