Does reading in dim light damage your eyes?
It does not damage them. It strains them, which means tiredness, a dry surface from blinking less, and sometimes a headache. The next morning your eyes are unchanged; the discomfort during the evening is real.
- Subject
- Eye health
- Topic
- UV, screens & protection
- Kind of question
- Other questions
- Last reviewed
- 22 September 2026
What this answer depends on
- How long you read in low light
- Whether you have an uncorrected prescription
- Whether you also have dry eye
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Where this answer sits
It is one of 483 answers in the vision and eye health knowledge base, filed under Everyday eye health in UV, screens & protection . The subject page carries the answers either side of it, and the hub is searchable.
This information is for educational purposes and does not replace an examination by a qualified eye-care professional.
General answers cannot tell you what is happening in your own eyes. Only an examination by a qualified ophthalmologist can do that.
Sources & further reading
We prefer primary sources. Where a claim comes from a manufacturer, a single study or a regulator, it is labelled as such below.
- EyeSmart: eye health information for the public
Patient-facing material from the largest ophthalmology professional body, covering conditions, tests and treatments outside refractive surgery.
Used for Cross-checking patient-facing explanations of non-refractive eye conditions; Describing what tests such as dilation and OCT involve.
Link checked 23 September 2026