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Related Experiment Video

Updated: Jan 3, 2026

Implanting Glass Spinal Cord Windows in Adult Mice with Experimental Autoimmune Encephalomyelitis
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Restricted Spatial Windows of Visibility in Myalgic Encephalomyelitis (ME).

Nadia S Ahmed1, Irene Gottlob1, Frank A Proudlock1

  • 1Department of Neuroscience, Psychology and Behaviour, College of Life Sciences, University of Leicester, Leicester LE1 7RH, UK.

Vision (Basel, Switzerland)
|November 19, 2019
PubMed
Summary

Individuals with Myalgic Encephalomyelitis (ME) show impaired spatial vision. This study found reduced contrast sensitivity, suggesting visual processing deficits may serve as a marker for ME diagnosis.

Keywords:
chronic fatigue syndromecontrast sensitivitymyalgic encephalomyelitisspatial visionvisual psychophysicswindows of visibility

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Area of Science:

  • Neuroscience
  • Ophthalmology
  • Clinical Medicine

Background:

  • Myalgic encephalomyelitis (ME) is a complex disorder with debilitating fatigue, poorly understood pathology, and controversial diagnosis.
  • Visual symptoms are quantifiable clinical features in ME that may aid diagnosis and reveal underlying pathology.
  • Investigating visual function, such as spatial contrast sensitivity, is crucial for understanding ME.

Purpose of the Study:

  • To investigate the impact of ME on spatial windows of visibility.
  • To utilize the spatial contrast sensitivity function (SCSF) as a tool to quantify visual processing differences in ME patients.
  • To explore potential visual markers for ME.

Main Methods:

  • Assessed contrast sensitivity using stationary sinusoidal gratings across a five-octave spatial frequency range (0.5–16 c/deg).
  • Compared visual function in 19 individuals with ME against 19 age- and gender-matched healthy controls.
  • Employed the spatial contrast sensitivity function to measure the ability to encode stimulus contrast.

Main Results:

  • The ME group demonstrated a restricted spatial window of visibility compared to controls.
  • A significant contrast sensitivity deficit was observed in the ME group, particularly at lower spatial frequencies.
  • The bandwidth of spatial vision was narrower in individuals with ME.

Conclusions:

  • Deficits in contrast sensitivity may serve as a potential visual biomarker for Myalgic Encephalomyelitis (ME).
  • These findings suggest abnormal visual processing in ME, potentially involving the retina and central visual pathways.
  • Quantifiable visual alterations offer new avenues for ME diagnosis and understanding its pathophysiology.