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Related Concept Videos

Immunofluorescence Microscopy01:12

Immunofluorescence Microscopy

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A fluorescence microscope uses fluorescent chromophores called fluorochromes, which can absorb energy from a light source and then emit this energy as visible light. Fluorochromes include naturally fluorescent substances (such as chlorophylls) and fluorescent stains that are added to the specimen to create contrast. Dyes such as Texas red and FITC are examples of fluorochromes. Other examples include the nucleic acid dyes 4’,6’-diamidino-2-phenylindole (DAPI), and acridine orange.
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Total Internal Reflection Fluorescence Microscopy01:05

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Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.
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Related Experiment Video

Updated: Apr 7, 2026

Quantitative Fundus Autofluorescence for the Evaluation of Retinal Diseases
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Quantitative Fundus Autofluorescence for the Evaluation of Retinal Diseases

Published on: March 11, 2016

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Fundus autofluorescence applications in retinal imaging.

Andrea Gabai, Daniele Veritti, Paolo Lanzetta1

  • 1Department of Medical and Biological Sciences - Ophthalmology, University of Udine, Udine; Istituto Europeo di Microchirurgia Oculare, Udine, Italy.

Indian Journal of Ophthalmology
|July 4, 2015
PubMed
Summary

Fundus autofluorescence (FAF) imaging offers insights into retinal metabolism and health for detecting various eye diseases. Alterations in FAF can aid clinicians in monitoring disease progression and understanding pathogenesis.

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Area of Science:

  • Ophthalmology
  • Medical Imaging
  • Retinal Diseases

Background:

  • Fundus autofluorescence (FAF) is an emerging imaging modality.
  • FAF provides valuable data on retinal metabolism and overall ocular health.
  • It aids in the detection and characterization of diverse retinal pathologies.

Purpose of the Study:

  • To review the fundamental principles of FAF imaging.
  • To discuss the clinical applications of FAF in ophthalmology.
  • To highlight the utility of FAF in disease monitoring and pathogenesis research.

Main Methods:

  • Review of existing literature on FAF principles.
  • Analysis of clinical case studies demonstrating FAF applications.
  • Synthesis of information regarding FAF alterations in various retinal diseases.

Main Results:

  • FAF imaging reveals metabolic and structural changes in the retina.
  • Specific FAF patterns correlate with distinct retinal pathologies.
  • FAF alterations serve as biomarkers for disease progression.

Conclusions:

  • FAF is a powerful tool for studying retinal diseases.
  • Understanding FAF principles enhances diagnostic capabilities.
  • FAF imaging contributes significantly to comprehending retinal disease pathogenesis.