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Related Concept Videos

Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and the...
Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...

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Related Experiment Video

Updated: Jul 11, 2026

Non-contact, Label-free Monitoring of Cells and Extracellular Matrix using Raman Spectroscopy
13:48

Non-contact, Label-free Monitoring of Cells and Extracellular Matrix using Raman Spectroscopy

Published on: May 29, 2012

Molecular-level differentiation of myopic corneal tissue using Raman spectroscopy and multivariate analysis.

Jiaxin Shi1, Yuqin Lin2, Jing Wang1

  • 1Key Laboratory of Opto-Electronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory for Photonics Technology, Fujian Normal University, Fuzhou 350117, China.

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
|March 30, 2025
PubMed
Summary

Raman spectroscopy reveals biochemical differences in myopic corneas, aiding in myopia diagnostics. This label-free technique identifies key metabolic and extracellular matrix changes linked to myopia progression.

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Resolving Water, Proteins, and Lipids from In Vivo Confocal Raman Spectra of Stratum Corneum through a Chemometric Approach
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Published on: September 26, 2019

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Last Updated: Jul 11, 2026

Non-contact, Label-free Monitoring of Cells and Extracellular Matrix using Raman Spectroscopy
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Full-Field Optical Coherence Microscopy for Histology-Like Analysis of Stromal Features in Corneal Grafts
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Resolving Water, Proteins, and Lipids from In Vivo Confocal Raman Spectra of Stratum Corneum through a Chemometric Approach
09:32

Resolving Water, Proteins, and Lipids from In Vivo Confocal Raman Spectra of Stratum Corneum through a Chemometric Approach

Published on: September 26, 2019

Area of Science:

  • Ophthalmology
  • Biochemistry
  • Spectroscopy

Background:

  • Myopia is a common refractive error with substantial visual and societal impacts.
  • Current understanding of myopic corneal pathogenesis lacks detailed molecular insights.
  • Morphological studies have advanced, but molecular investigations are limited.

Purpose of the Study:

  • To investigate biochemical differences in corneal stromal tissues between low and high myopia.
  • To explore the utility of Raman spectroscopy for myopia diagnostics.
  • To identify molecular markers associated with myopic corneal pathogenesis.

Main Methods:

  • Raman spectroscopy, a label-free technique, was used on corneal stromal tissues.
  • Tissues were obtained from patients undergoing small incision lenticule extraction surgery for myopia.
  • Principal component analysis-linear discriminant analysis (PCA-LDA) was applied for classification.

Main Results:

  • Distinct biochemical variations were observed in carbohydrate and tryptophan metabolism.
  • Significant differences were noted in extracellular matrix remodeling between myopia groups.
  • A PCA-LDA model achieved 79.7% accuracy and an AUC of 0.811 for myopia classification.

Conclusions:

  • Raman spectroscopy effectively differentiates biochemical profiles of myopic corneas.
  • Metabolic pathways and ECM remodeling are critical in myopic corneal pathogenesis.
  • This technique shows promise for developing novel diagnostic tools for myopia.