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Related Concept Videos

Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...
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Visual acuities in patients with autosomal recessive retinitis pigmentosa associated with four rod phototransduction genes.

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Handbook of clinical neurology·2026
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Related Experiment Video

Updated: Jun 1, 2026

A Workflow to Quantitatively Determine Age-Related Macular Degeneration Lesion-Specific Variations in Fundus Autofluorescence
08:54

A Workflow to Quantitatively Determine Age-Related Macular Degeneration Lesion-Specific Variations in Fundus Autofluorescence

Published on: May 26, 2023

Stargardt macular dystrophy.

Yannik Laich1, Michalis Georgiou2, Michel Michaelides3

  • 1Moorfields Eye Hospital, London, United Kingdom; UCL Institute of Ophthalmology, University College London, London, United Kingdom; Eye Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany.

Handbook of Clinical Neurology
|May 30, 2026
PubMed
Summary
This summary is machine-generated.

Stargardt macular dystrophy (STGD1) is an inherited condition causing central vision loss due to ABCA4 gene variants. Research explores its mechanisms and potential gene therapies for vision restoration.

Keywords:
ABCA4Clinical trialsGene therapyGenotype-phenotype correlationInherited retinal diseaseMacular dystrophyMultimodal imagingStem cell therapy

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LipidUNet-Machine Learning-Based Method of Characterization and Quantification of Lipid Deposits Using iPSC-Derived Retinal Pigment Epithelium
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Last Updated: Jun 1, 2026

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Published on: July 28, 2023

Area of Science:

  • Ophthalmology
  • Genetics
  • Molecular Biology

Background:

  • Stargardt macular dystrophy (STGD1) is the leading inherited cause of macular degeneration.
  • It results from ABCA4 gene variants, presenting genetic heterogeneity that complicates genotype-phenotype correlations.
  • Pathophysiology involves visual cycle dysfunction, leading to lipofuscin accumulation and retinal cell damage.

Purpose of the Study:

  • To summarize the current understanding of Stargardt macular dystrophy (STGD1).
  • To highlight the genetic basis, clinical manifestations, and diagnostic approaches for STGD1.
  • To review current management strategies and emerging therapeutic research for STGD1.

Main Methods:

  • Review of existing literature on STGD1 genetics, pathophysiology, clinical features, diagnosis, and management.
  • Analysis of genotype-phenotype correlations associated with different ABCA4 variants.
  • Examination of current and emerging treatment modalities, including pharmacologic, gene, and stem cell therapies.

Main Results:

  • STGD1 is caused by ABCA4 gene variants, with null variants linked to severe early-onset disease and missense/intronic variants to milder late-onset phenotypes.
  • Clinical signs include central vision loss, macular atrophy, and retinal flecks due to lipofuscin accumulation.
  • Diagnostic tools include OCT, fundus autofluorescence, ERG, and microperimetry.

Conclusions:

  • STGD1 management focuses on supportive care and photoprotection, with no definitive treatments currently available.
  • Ongoing research into pharmacologic, gene, and stem cell therapies offers future hope for vision preservation and restoration in STGD1 patients.
  • Understanding genotype-phenotype correlations is crucial for predicting disease progression and tailoring management strategies.