Preparing Porcine Eyes for Confocal Reflectance Microscopy to Visualize the Vitreous Collagen Fiber Network

Area of Science:

• Ophthalmology
• Biophysics
• Materials Science

Background:

• The vitreous gel's collagen network influences viscoelastic properties and retinal disease.
• Studying the vitreous collagen network is difficult due to imaging challenges like dehydration and dye artifacts.

Purpose of the Study:

• To develop and validate a method for imaging the native vitreous collagen network.
• To enable quantitative analysis of collagen organization and its relation to vitreous properties.

Main Methods:

• Dissection of porcine eyes and mounting on an inverted microscope.
• Confocal reflectance microscopy for imaging the vitreous collagen network in its native state.
• Quantitative image analysis of collagen network features, including structure, orientation, and distribution.

Main Results:

• The developed protocol successfully images the vitreous collagen network without exogenous dyes or dehydration.
• Confocal reflectance microscopy preserves the native structure, orientation, and distribution of collagen fibers.
• The method allows for detailed quantitative analysis of the vitreous collagen network.

Conclusions:

• Confocal reflectance microscopy is a valuable tool for studying the native vitreous collagen network.
• This technique can elucidate the structural basis of vitreous gel stiffness in both healthy and diseased states.
• The protocol provides a robust method for advancing research in vitreoretinal diseases.