What causes dry eyes?
Dry eyes are caused by a mix of tear production, tear quality, eyelid and blinking behaviour, medication, general health and environment. In most people several of those contribute at once.
- Subject
- Eye conditions
- Topic
- Dry eye
- Kind of question
- What causes…
- Last reviewed
- 22 September 2026
In more detail
Age and hormonal change are common contributors, which is why the tear film is assessed more carefully in older patients and taken seriously around menopause.
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Where this answer sits
It is one of 483 answers in the vision and eye health knowledge base, filed under Eye conditions & diseases in Dry eye . The subject page carries the answers either side of it, and the hub is searchable.
Subjects this question touches
The pages that answer the subject behind the question, rather than the question itself.
- Condition Dry eye
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.
- Eye Health Information
Condition-by-condition eye health information from a US government research institute, written for patients rather than for clinicians.
Used for Plain-language explanations of eye conditions and their symptoms; Healthy vision and screening guidance.
Link checked 23 September 2026
- 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