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mfERG in normal and lesioned rabbit retina
Karin W Gjörloff1, Sten Andréasson, Fredrik Ghosh
1Department of Ophthalmology, University Hospital, Lund, Sweden. karin.gjorloff@oft.lu.se
Summary
The multifocal electroretinogram (mfERG) effectively detects retinal lesions in rabbits. This technique can identify cone function changes in lesioned rabbit retinas, aiding experimental research.
Area of Science:
- Ophthalmology
- Retinal Physiology
- Experimental Research
Background:
- Cone function is crucial for visual acuity and color vision.
- Understanding retinal function in disease models is vital for developing treatments.
- The rabbit retina serves as a model for studying visual function.
Purpose of the Study:
- To evaluate and describe cone function in normal and lesioned rabbit retinas.
- To assess the utility of multifocal electroretinogram (mfERG) in detecting retinal damage.
- To investigate changes in retinal function following surgical intervention.
Main Methods:
- A surgical retinectomy was performed on one eye of twelve rabbits.
- Multifocal electroretinograms (mfERG) were recorded preoperatively and up to 13 weeks postoperatively.
- Histological analysis was performed to confirm the size of the retinal lesions.
Main Results:
- mfERG amplitudes were significantly reduced in retinectomized eyes up to 3 weeks postoperatively.
- Distinct differences in amplitudes were observed between lesioned and unlesioned quadrants by 7 weeks.
- Unoperated eyes showed higher amplitudes in the visual streak, correlating with cone distribution.
Conclusions:
- mfERG is a viable tool for detecting retinal lesions as small as 1 mm in rabbit models.
- Visualization of the fundus during mfERG is essential to mitigate artifacts from light scattering.
- This technique aids in experimental retinal research and understanding cone function in lesioned retinas.