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Related Concept Videos

Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
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Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
Overview of Microscopy Techniques01:22

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The early pioneers of microscopy opened a window into the invisible world of microorganisms. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes that leveraged nonvisible light, such as fluorescence microscopy that uses an ultraviolet light source and electron microscopy that uses short-wavelength electron beams. These advances significantly improved magnification, image resolution, and contrast. By comparison, the...
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Two-dimensional (2D) microscopy encompasses a range of optical techniques that capture images within a single focal plane, offering detailed representations of microscopic structures. These techniques are essential in biological and medical research, enabling the visualization of cellular and subcellular structures with different levels of contrast and specificity.There are several major types of 2D microscopy, each with strengths and applications.Bright-Field MicroscopyBright-field microscopy...
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Three-dimensional imaging techniques are essential in cell biology, allowing researchers to visualize intricate cellular structures with high resolution. Two prominent methods, Differential Interference Contrast Microscopy (DIC) and Confocal Scanning Laser Microscopy (CSLM), provide distinct advantages for imaging live and thick specimens, respectively.Differential Interference Contrast MicroscopyDIC microscopy enhances contrast in transparent, unstained samples by converting phase...

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Related Experiment Video

Updated: May 26, 2026

Corneal Confocal Microscopy: A Novel Non-invasive Technique to Quantify Small Fibre Pathology in Peripheral Neuropathies
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Motion-Tracking Brillouin Microscopy for Keratoconus Suspect Identification: Comparison With Multimodal Corneal

Hongyuan Zhang1, Bassel Hammoud1, Bianca N Susanna2

  • 1From the Cole Eye Institute (H.Z., B.H., B.N.S., B.A.L.D., J.B.R.), Cleveland Clinic, Cleveland, Ohio, USA.

American Journal of Ophthalmology
|February 27, 2026
PubMed
Summary

Motion-tracking Brillouin microscopy excels at identifying keratoconus suspects by detecting focal corneal weakening. This advanced technique significantly outperforms other imaging methods in distinguishing between keratoconus suspect and normal eyes.

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Area of Science:

  • Ophthalmology
  • Biomedical Optics
  • Medical Imaging

Background:

  • Keratoconus suspect (KCS) identification relies on accurate diagnostic tools.
  • Multimodal corneal imaging is currently used, but novel methods are needed for improved efficacy.

Purpose of the Study:

  • To compare the diagnostic performance of motion-tracking (MT) Brillouin microscopy against established multimodal corneal imaging techniques for KCS identification.

Main Methods:

  • A prospective, cross-sectional study evaluated 56 eyes (28 KCS, 28 controls).
  • Techniques included MT Brillouin microscopy, Scheimpflug tomography, AS-OCT, and Corvis ST.
  • Sensitivity, specificity, and AUROC were calculated for all modalities.

Main Results:

  • MT Brillouin metrics (MTB-min and MTB-mean) demonstrated superior diagnostic performance compared to all multimodal imaging metrics.
  • MTB-min achieved 100% sensitivity and 96% specificity (AUC=0.999), outperforming indices like TBI, PRFI, KI, and IHD.
  • Epithelial metrics showed poor performance in differentiating groups.

Conclusions:

  • Motion-tracking Brillouin microscopy effectively identifies focal corneal weakening in KCS.
  • MT Brillouin microscopy significantly outperforms current multimodal imaging techniques in differentiating KCS from normal eyes.