Reading in dim light ruins children's eyesight

What the research found

Eye health guidance for kids says reading in dim light isn't actually harmful to your eyes. It may just make them feel tired. Australian health information also lists straining to see when the light is bad as a cause of eye strain, which usually goes away with rest.

Some research points to a possible link with short-sightedness (myopia). A 2022 survey of 1400 school children in North India found more myopia among children who read in dim light. A 2018 Australian study using light sensors found differences in dim light exposure between children with and without myopia. Neither study shows dim light caused the myopia.

A 2023 meta-analysis found myopia risk factors were mixed, with 20 positive and 17 null findings. Less near-work time and more outdoor time were linked to lower myopia. A 2025 systematic review said it is hard to separate the effects of outdoor time and near work.

What it doesn’t mean

• This doesn't mean dim light is good for reading. Straining to see in bad light can cause eye strain, with tired eyes and headaches. Regular breaks help prevent it.
• More outdoor time and less near-work time are linked to lower myopia risk, so they are worth encouraging whatever the lighting.
• See a GP or optometrist if your child's eye strain doesn't get better after resting their eyes, or if it gets worse.