Digital fatigue involves exhaustion from prolonged screen use, driven by visual strain, cognitive overload, disrupted circadian rhythms, and static postures. Your eyes experience multiple stressors: reduced blink rate (normally 15-20 per minute, dropping to 5-7 with screens) causes tear film evaporation and dry eyes; sustained accommodation (lens focusing) at fixed distances fatigues your ciliary muscles; blue light exposure from screens stimulates your intrinsically photosensitive retinal ganglion cells, signaling your suprachiasmatic nucleus that it's daytime, suppressing melatonin production and disrupting sleep. Your cognitive systems face constant task-switching, information processing, and decision fatigue, depleting prefrontal cortex resources and neurotransmitters. Video calls add unique stress: constant self-monitoring activates your anterior cingulate cortex (detecting social threats), lack of normal nonverbal cues requires extra processing, and reduced mobility prevents normal stress discharge through movement. Static postures cause muscle tension, reduced circulation, and stress on your neck and back structures. The 'organism as team' framework helps because your visual system is working in ways it didn't evolve for, your circadian clock is receiving conflicting light signals, your cognitive centers are overloaded, and your musculoskeletal system lacks natural movement variation. Supporting your team means the 20-20-20 rule (every 20 minutes, look 20 feet away for 20 seconds) to relax ciliary muscles, blue light filters especially evening, regular breaks for movement, proper ergonomics to reduce postural strain, time in natural light to support circadian rhythms, and boundaries around screen time. Your organism needs environmental conditions matching its design. ⚕️ This protocol does not replace professional consultation.