@drrupawong: 1️⃣ Screens don’t damage healthy eyes — but they significantly change how the visual system functions. 
When we look at screens, our blink rate drops by ~50–60%, and incomplete blinks increase. At the same time, the accommodative system is held in sustained near focus for hours. The result isn’t structural damage — it’s functional fatigue: eye strain, headaches, blurred vision at distance, and difficulty shifting focus. These symptoms can become persistent if habits don’t change. 2️⃣ Dry eye isn’t just age-related — it’s behavior-related. 
Prolonged screen use worsens tear film instability through reduced blinking and poor meibomian gland expression. Over time, this contributes to evaporative dry eye and chronic ocular surface inflammation. That’s why so many patients in their 20s and 30s now have symptoms we used to associate with much older adults. 3️⃣ Screens don’t cause myopia in adults — but they do accelerate it in children.
Once axial growth is complete, screens don’t make adult eyes longer. But in kids, prolonged near work combined with reduced outdoor light exposure is strongly associated with earlier onset and faster progression of myopia. Outdoor light stimulates retinal dopamine release, which acts as a brake on eye growth — something screens can’t replicate. 4️⃣ The most powerful screen effect isn’t ocular — it’s neurologic. 
Evening screen exposure suppresses melatonin and delays circadian rhythms. Poor sleep then worsens eye strain, focus, mood, and pain perception the next day. Many “eye complaints” I see are actually downstream effects of disrupted sleep and nervous system overload. Screens aren’t inherently harmful.
But unexamined screen habits quietly shape eye comfort, sleep, and visual performance over decades. This is the conversation I wish we were having sooner #screentime #parentsoftiktok #eyehealth #raisingkids #digitalage

Rupa Wong M.D.

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Wednesday 28 January 2026 23:45:29 GMT