Corneal electrode for recording electroretinograms in rats

Area of Science:

• Ophthalmology
• Neuroscience
• Biomedical Engineering

Background:

• Corneal contact lens electrodes are preferred for electroretinograms (ERGs) in many species due to convenience.
• Cotton-wick electrodes are still used for rat ERGs because fabricating small corneal electrodes for rat eyes is challenging.
• Existing methods for rat ERG recording are limited by electrode availability and fabrication difficulties.

Purpose of the Study:

• To develop an easily fabricated, inexpensive corneal electrode for recording electroretinograms in rats.
• To provide a practical alternative to existing methods for rat electroretinogram measurements.

Main Methods:

• Corneal electrodes were prepared using readily available disposable needles.
• The fabricated electrodes were tested for their suitability in recording electroretinograms from rat subjects.
• Six rats were used to evaluate the performance of the novel corneal electrodes.

Main Results:

• The disposable needle-based corneal electrodes were simple and inexpensive to prepare.
• Successful electroretinogram recordings were achieved in all six rats using the novel electrodes.
• The electrodes demonstrated effectiveness for standard electroretinogram measurements in rats.

Conclusions:

• Disposable needles can be effectively repurposed to create functional corneal electrodes for rat electroretinograms.
• This method provides a cost-effective and accessible solution for researchers needing to perform rat ERG recordings.
• The developed electrode overcomes the fabrication challenges associated with small corneal electrodes for rat eyes.