Prolonged complementary chromatopsia in users of video display terminals

Area of Science:

• Ophthalmology
• Visual Neuroscience

Background:

• Digital screen use is ubiquitous, raising questions about potential visual side effects.
• Understanding transient visual phenomena is crucial for occupational health and patient counseling.

Observation:

• Four individuals experienced prolonged complementary chromatopsia after using monochrome video display terminals.
• The visual disturbance persisted for at least 30 minutes post-exposure.

Findings:

• Abnormal responses to pseudoisochromatic plates indicated impaired color vision.
• The phenomenon was independent of pre-existing color vision defects, ocular disease, or drug use.
• Monocular occlusion prevented chromatopsia in the covered eye, suggesting a direct effect on the stimulated eye.

Implications:

• This study identifies a specific, induced visual disturbance potentially linked to afterimage phenomena.
• Awareness of this visual effect is important for individuals working extensively with monochrome displays.
• Further research into the mechanisms of screen-induced visual anomalies is warranted.