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Related Experiment Video

Updated: Mar 16, 2026

Multifocal Electroretinograms

Multifocal Electroretinograms

Published on: December 4, 2011

L- and M-cone-directed Global flash multifocal electroretinogram: conceptualization and development.

Nandini Ravi^1,2, Henry H L Chan^3,4,5,6

¹Laboratory of Experimental Optometry (Neuroscience), School of Optometry, The Hong Kong Polytechnic University, 11 Yuk Choi Road, Hung Hom, Kowloon, Hong Kong, China.

Documenta Ophthalmologica. Advances in Ophthalmology

|March 14, 2026

Summary

This summary is machine-generated.

This study developed a new L- and M-cone directed global flash multifocal electroretinogram (mfERG) to assess retinal function. The novel mfERG method shows potential for evaluating cone-related diseases and color vision.

Keywords:

Cone photoreceptors L/M cone response ratio LED stimulator Multifocal ERG Silent substitution

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Multifocal Electroretinograms

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Published on: December 4, 2011

Using the Electroretinogram to Assess Function in the Rodent Retina and the Protective Effects of Remote Limb Ischemic Preconditioning

Using the Electroretinogram to Assess Function in the Rodent Retina and the Protective Effects of Remote Limb Ischemic Preconditioning

Published on: June 9, 2015

Simultaneous ex vivo Functional Testing of Two Retinas by in vivo Electroretinogram System

Simultaneous ex vivo Functional Testing of Two Retinas by in vivo Electroretinogram System

Published on: May 6, 2015

Area of Science:

Ophthalmology
Neuroscience
Visual Science

Background:

Multifocal Electroretinogram (mfERG) is crucial for studying cone photoreceptor pathways.
The global flash mfERG (MOFO mfERG) evaluates outer and inner retinal responses.
Silent substitution stimulus integration in MOFO mfERG is unexplored.

Purpose of the Study:

Develop an L- and M-cone directed global flash mfERG.
Incorporate silent substitution stimulus for enhanced cone specificity.
Evaluate retinal responses from specific cone types.

Main Methods:

Created a silent substitution stimulus for LED monitors.
Developed L- and M-cone directed MOFO mfERG with 19-hexagon stimulation.
Tested in 36 Chinese adults and validated using simulated color vision deficiency.

Main Results:

Mathematical validation confirmed accurate cone quantal catches.
Simulated protanopia/deuteranopia showed significant amplitude reduction (p<0.05).
M-cone responses were faster and higher amplitude than L-cone responses (p<0.001).

Conclusions:

Developed L- and M-cone directed global flash mfERG protocols.
These protocols offer detailed insights into cone-specific retinal responses.
Potential utility in diagnosing cone-related diseases and assessing color vision.