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The Retina

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The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.

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Related Experiment Video

Updated: May 11, 2026

Transretinal ERG Recordings from Mouse Retina: Rod and Cone Photoresponses

Transretinal ERG Recordings from Mouse Retina: Rod and Cone Photoresponses

Published on: March 14, 2012

Retinal cell types: Rod and cone photoreceptors.

Zander Esh¹, Vladimir J Kefalov²

¹School of Medicine, University of California Irvine, Irvine, CA, United States; Department of Ophthalmology, Gavin Herbert Eye Institute, University of California Irvine, Irvine, CA, United States.

Handbook of Clinical Neurology

|May 9, 2026

Summary

This chapter reviews rod and cone photoreceptor research, covering techniques, development, anatomy, physiology, metabolism, and diseases. It highlights current knowledge and future therapeutic directions for vision research.

Keywords:

Outer segment Photoreceptors Phototransduction Retinal degeneration Retinal metabolism Rods and cones Visual cycle Visual pigment

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Last Updated: May 11, 2026

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Area of Science:

Ophthalmology
Cell Biology
Neuroscience

Background:

Rod and cone photoreceptors are crucial for vision, converting light into electrical signals.
Understanding their function is key to addressing visual impairments.

Purpose of the Study:

To provide a comprehensive overview of rod and cone photoreceptor research.
To discuss current knowledge, research methodologies, and future directions.

Main Methods:

Review of existing literature on photoreceptor research techniques.
Analysis of photoreceptor development, anatomy, and physiology.
Examination of cellular metabolism and disease-related genetic bases.

Main Results:

Detailed exploration of photoreceptor electrophysiology and functional characteristics for dim- and bright-light vision.
Discussion of unique metabolic demands of photoreceptors.
Overview of photoreceptor diseases, their genetic underpinnings, and pathophysiology.

Conclusions:

Current understanding of photoreceptor biology is extensive, with ongoing advancements in research techniques.
Future research directions and emerging therapeutics promise new clinical interventions for photoreceptor-related diseases.