Screen fatigue is harming eyes and sleep, lifestyle expert warns

Constant screen use is damaging eyes and undermining sleep quality — not primarily because of screen light, but because of a fundamental lack of recovery time, according to Integrative Lifestyle Expert Luke Coutinho.

Speaking to HT Lifestyle, Coutinho warned that moving from a work laptop to a personal phone at the end of the day gives the body no genuine signal to wind down, leaving the nervous system in a constant state of stimulation. He has outlined a practical one-week digital reset plan to help break the cycle and restore both eye health and sleep.

Why darkness matters more than night mode

Coutinho, who has spent over 15 years working with clients on lifestyle, sleep, stress and recovery, said the pattern is one he observes repeatedly. "A person closes the laptop after ten hours of work, only to 'rest' by scrolling on the phone for another hour. The body never receives a true signal to wind down. The eyes do not recover from one screen by moving to another screen. They recover when we create real pauses, darkness, and sleep," he said.

Darkness, he explained, functions as a biological recovery signal — one of the oldest the human body responds to. When evening light fades and screens are set aside, the brain registers that it is time to slow down, supporting melatonin production, circadian rhythm and deeper sleep.

Coutinho noted that Harvard Health Publishing has highlighted how light exposure at night can suppress melatonin and disrupt circadian rhythm. "This is why a night mode filter is not the same as a digital detox. It may reduce some light intensity, but it does not remove stimulation, notifications, emotional triggers, or the constant pull of content. Before bed, the goal is not just to protect the eyes. It is to protect the nervous system," he said.

Screen breaks are not optional

Digital eye strain typically results from prolonged close-focus work, reduced blinking, poor posture, glare and insufficient breaks. The American Academy of Ophthalmology recommends conscious blinking and regular screen breaks to reduce dryness and discomfort.

Coutinho advocates the 20-20-20 rule as a simple and effective countermeasure. "A simple habit that works beautifully is the 20-20-20 rule: every 20 minutes, look at something 20 feet away for at least 20 seconds. This relaxes the eye muscles and interrupts constant near-focus strain," he said. He also recommends a technique called palming: "Rub your palms together, gently cup them over closed eyes without pressing, and breathe slowly for a few moments. This creates darkness, warmth, and stillness."

A one-week digital reset plan

Coutinho has set out the following strategies to try for one week to reduce the cumulative effects of screen overuse:

• Stop scrolling, binge-watching and non-essential screen use at least 60 minutes before bed — or begin with 30 minutes if an hour feels too challenging
• Keep the phone out of the bedroom, or at least away from the bed
• Limit evening phone use to essential work, calls, messages or emergency applications only
• Use dim, warm lighting at night and avoid harsh overhead lights after sunset
• Wear blue-light blocking glasses for unavoidable evening screen use, but treat them as a support tool rather than permission to continue scrolling
• Follow the 20-20-20 rule throughout work hours
• Blink consciously when using screens and avoid holding devices too close
• Get natural morning light to support circadian rhythm
• Support eye health through foods rich in vitamin A, omega-3s and lutein — including carrots, spinach, walnuts, flaxseeds and colourful vegetables

A stronger warning for children

Coutinho stressed that children require even firmer boundaries around recreational screen use. Their sleep, attention, mood and dopamine regulation are still developing, he noted, making them particularly vulnerable to the effects of excessive stimulation and irregular screen habits.

He concluded with a broader message about what the eyes actually need. "Your eyes are not asking for another filter. They are asking for rhythm. They need blinking, distance, darkness, sleep, hydration, nutrients, and discipline around unnecessary screen use.

Screen time for work may not always be avoidable. Mindless scrolling usually is. The difference matters. Health is often built in simple choices repeated daily. Tonight, give your eyes what they are truly waiting for: darkness, stillness, and sleep."

Note: This article is for informational purposes only and is not a substitute for professional medical advice. Always consult a qualified doctor regarding any medical condition.