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In vivo confocal microscopy of the human cornea
I Jalbert1, F Stapleton, E Papas
1Cooperative Research Centre for Eye Research and Technology, University of New South Wales, Sydney, Australia. i.jalbert@crcert.unsw.edu.au
The British Journal of Ophthalmology
|January 25, 2003
Summary
In vivo confocal microscopy offers high-resolution imaging of the human cornea, aiding in diagnosing conditions like keratitis and dystrophies. This technology provides real-time cellular visualization for improved corneal examination.
Area of Science:
- Ophthalmology
- Biomedical Optics
- Cellular Imaging
Background:
- Traditional corneal examination methods lack cellular resolution.
- In vivo confocal microscopy (IVCM) represents a significant advancement in visualizing corneal structures.
- Previous imaging techniques were limited in their ability to assess living corneal tissue at a cellular level.
Purpose of the Study:
- To detail the optical principles of IVCM.
- To highlight the advantages of IVCM over prior diagnostic methods.
- To review the clinical applications and literature concerning IVCM for human cornea observation.
Main Methods:
- Utilizes a single point for illumination and observation to achieve high resolution.
- Employs rapid scanning techniques for real-time, full-field-of-view image reconstruction.
- Allows for non-invasive, in situ visualization of corneal layers.
Main Results:
- Enables visualization of corneal epithelium, Bowman's layer, stroma, and endothelium at 1-2 micrometer resolution.
- Provides objective measurements of corneal sublayer thickness and haze via backscattered light intensity.
- Demonstrates utility in diagnosing and monitoring infective keratitis, corneal dystrophies, and changes related to refractive surgery and contact lens wear.
- Facilitates real-time assessment of endothelial cell morphology and density.
Conclusions:
- IVCM provides unprecedented cellular-level visualization of living corneal tissue.
- It serves as a valuable addition to the ophthalmologist's diagnostic toolkit.
- The technology aids in differential diagnosis and monitoring subtle corneal changes.