Reading in Dim Light Ruins Your Eyesight

Reading in dim light does not cause permanent eye damage, a fact confirmed by the American Academy of Ophthalmology. At 50 lux (typical bedside lamp level), low light can cause temporary strain like dryness or fatigue, but a 2018 study found no lasting changes in visual acuity after 2 hours of reading. True culprits for eye strain are screen glare and infrequent blinking; using soft warm light and taking a 20-second break every 20 minutes alleviates discomfort. Vision is resilient—dim light merely tires it, not ruins it—so enjoy your book without fear.