Increased Vulnerability to Pattern-Related Visual Stress in Myalgic Encephalomyelitis

Area of Science:

• Neuroscience
• Ophthalmology
• Psychology

Background:

• Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) is a complex multisystem illness.
• Visual disturbances are frequently reported by ME/CFS patients.
• The underlying mechanisms of visual stress in ME/CFS remain unclear.

Purpose of the Study:

• To investigate pattern-related visual stress in individuals with ME/CFS.
• To compare visual stress responses between ME/CFS patients and healthy controls.
• To explore the potential diagnostic utility of pattern glare in ME/CFS.

Main Methods:

• A cohort of 20 ME/CFS patients and 20 matched controls participated.
• The Pattern Glare Test was employed to assess visual stress.
• Participants reported visual distortions experienced when viewing patterns of varying spatial frequencies (low, mid, high).

Main Results:

• ME/CFS patients reported significantly higher pattern glare scores for mid-spatial frequency patterns compared to controls.
• Differences in glare scores between mid and high spatial frequencies were also significantly greater in ME/CFS patients.
• These findings suggest altered visual processing in ME/CFS.

Conclusions:

• Pattern-related visual stress is a notable feature in ME/CFS patients.
• Visual stress assessment may offer a potential clinical biomarker for ME/CFS diagnosis.
• Further research is needed to elucidate the neural pathways involved in ME/CFS-related visual disturbances.