Health · England
Making reading more comfortable
Your browser or device provides the reading voice.
This guide is for people in England.
Reading can feel uncomfortable for some people.
Tell someone if words blur or your eyes hurt.
Start with an eye examination.
An overlay test does not replace an eye examination.
Dyslexia and visual discomfort are different.
Someone can have both.
Some people prefer coloured backgrounds or coloured sheets.
Ask which colour, size and spacing feel comfortable.
Evidence about coloured filters is uncertain.
They do not cure dyslexia.
Some lenses and assessments cost money.
Ask about costs and possible benefits before paying.
Keep getting reading support if you need it.
A comfortable colour does not replace that support.
New eye pain or vision changes need urgent advice.
Contact your GP or NHS 111.
Sudden loss of sight needs emergency help.
Sudden severe eye pain needs emergency help too.
Go to A&E or call 999.
What you can do next
Ask for an eye check and clear explanations.
Choose reading settings that feel comfortable for you.
Read optical advice about coloured filters Web pageThis link opens another website.
It may use harder words.
More useful links
- Balanced patient information on filters Web page
What to consider before trying overlays or lenses.
- Professional guidance on tinted lenses Web page
Explains why evidence, costs and expectations should be discussed.
These links open other websites.
They may use harder words.
Visual stress, Irlen and comfortable reading
Explore reading comfort, eye checks and the uncertain evidence for coloured overlays and tinted lenses.
Children and adults · England
What people mean by visual stress
People may describe eyestrain, headaches, difficulty focusing, light sensitivity or text seeming to move or blur while reading. Terms include visual discomfort, visual stress and Meares-Irlen or Irlen syndrome. These words do not by themselves establish a diagnosis or explain the cause. Tell an eye professional what happens, when it happens and whether anything helps.
Have an eye examination first
An optometrist can check eye health, sight and whether glasses or further investigation are needed. Explain any communication or sensory support required. A commercial overlay screening does not replace a proper sight test. Follow advice about eye problems or further assessment before attributing symptoms to visual stress. Ask about NHS sight-test eligibility and any additional private charges.
Visual discomfort is not the same as dyslexia
Dyslexia is a specific learning difficulty affecting reading and writing. Visual discomfort can occur with or without dyslexia. Finding a comfortable colour does not diagnose dyslexia, and tinted lenses or overlays are not a treatment or cure for it. Continue appropriate educational assessment, reading support and workplace adjustments when these are needed.
What the evidence can and cannot show
Professional optical bodies acknowledge that some people report better visual comfort with filters. They also describe uncertainty and disagreement in the evidence. There is insufficient strong evidence that overlays or precision-tinted lenses reliably improve reading ability or educational achievement, and benefit cannot be promised. Respect a person’s reported comfort without claiming this proves a particular diagnosis or a wider treatment effect.
Try practical changes chosen by the reader
Ask which presentation is easiest: suitable text size and spacing, less clutter, a preferred background, comfortable brightness, reduced glare or shorter reading periods. A screen reader or audio version may also help access information. Change one thing at a time where practical and ask how it feels. There is no single background colour or font that suits everyone with dyslexia or visual discomfort.
If considering an overlay or tinted lenses
After eye assessment, discuss a low-cost trial, what improvement you want to notice and when to review it. An overlay is a coloured sheet placed over text; precision-tinted lenses are individually tinted spectacles. A preferred overlay colour does not automatically identify a lens tint. Filters can affect colour perception. Get advice on suitability for the tasks you do, especially where accurate colour recognition matters.
Discuss cost and expectations before paying
Ask for an itemised price for testing, lenses or overlays, follow-up and replacements. Ask what evidence supports the promised outcome and what happens if it does not help. These products are not usually available on the NHS. Private payment does not guarantee benefit. Avoid pressure to buy an expensive package or claims that a filter cures dyslexia, autism or ADHD.
Keep useful preferences and review changing symptoms
If a simple colour or layout makes reading more comfortable, it can remain a personal access preference without a diagnostic claim. Record what helps in an accessibility passport. Seek further professional advice if discomfort continues or changes. New vision changes or eye pain need urgent GP or NHS 111 advice; suddenly being unable to see or sudden severe eye pain needs A&E or 999.
Words you could use
“Reading causes this discomfort: … Please check my eyes, explain possible causes, and discuss options, evidence and costs before I buy anything.”
More useful links
- Balanced patient information on filters Web page
What to consider before trying overlays or lenses.
- Professional guidance on tinted lenses Web page
Explains why evidence, costs and expectations should be discussed.
These links open other websites.
They may use harder words.
Where the information comes from
Links checked 1 November 2026.
These links open other websites.
They may use harder words.
- Association of Optometrists: coloured filters Web page
Eye examination first, visual discomfort, personal preferences and uncertain benefit.
- College of Optometrists: tinted lenses and overlays Web page
Evidence limits, no treatment claim for specific learning difficulties, and costs.
- ABDO: visual discomfort Web page
Balanced information, uncertain reading outcomes and misleading cure claims.
- NHS: vision loss Web page
Urgent and emergency responses to new eye symptoms.
- NHS: dyslexia in adults Web page
Educational assessment and support distinct from eye care.