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Scotopic sensitivity syndrome

Scotopic sensitivity syndrome, or visual stress, testing is available at HSR Psychology by our psychologists, and is available from the age of 8 years old.

What is scotopic sensitivity syndrome?

Scotopic sensitivity syndrome can cause children and young people to have difficulties with reading and related activities. Scotopic sensitivity syndrome can cause problems reading printed text leading to reading-related issues such as:

Indicators of scotopic sensitivity syndrome can be similar to those of Dyslexia, which can lead to a misdiagnosis. Scotopic sensitivity syndrome can be helped by using coloured overlays during reading, colour tinted glasses or changing the background colour on electronic devices.

Visual stress (sometimes called 'Meares-Irlen syndrome' or 'scotopic sensitivity syndrome') is the experience of unpleasant visual symptoms when reading, especially for prolonged periods. Symptoms include illusions of shape, movement and colour in the text, distortions of the print, loss of print clarity, and general visual irritation. Visual stress can also cause sore eyes, headaches, frequent loss of place when reading, and impaired comprehension.

Visual stress is caused by the striped effect of black writing on white paper which causes over stimulation and excitation of the visual cortex .

National Health Service (NHS), Visual Stress and Coloured Overlays

If a child or young person is complaining of difficulty reading, having headaches when they read or suggest printed text seems to move, then they could benefit from a scotopic sensitivity syndrome assessment.

How is scotopic sensitivity syndrome assessed?

Scotopic sensitivity syndrome is a self-reported assessment through a structured conversation with the child or young person whilst carrying out a number of reading activities using different coloured overlays. The level of discomfort and difficulty experienced during reading activities is recorded throughout the assessment.

Visual stress assessment

A girl completing an assessment for scotopic sensitivity syndrome, using coloured overlays



What happens after an assessment?

If a child or young person has scotopic sensitivity syndrome then our psychologists will discuss various options for coloured overlays or tinted lenses in the appropriate colour to help. Through wearing tinted lenses or using an overlay the individual should notice a positive difference in their reading activities.

What interventions do we support?

We value ourselves on providing a complete service and if you would like further input following an assessment then we would be happy to support a literacy intervention if this is requested. Usually, with scotopic sensitivity syndrome, the use of tinted lenses or coloured overlays negates the need for intensive intervention following an assessment.

Coloured overlays and coloured glasses can increase the speed of reading, although with conventional text the improvement may only be apparent after 10 minutes of reading, when the child would begin to tire were an overlay not used. If the text is closely spaced, the benefit is more immediate.

National Health Service (NHS), Visual Stress and Coloured Overlays

How much does an assessment for scotopic sensitivity syndrome cost?

As an assessment for scotopic sensitivity syndrome is a relatively consistent assessment in terms of timings, an initial discussion is not necessary prior to the assessment.

  • Coloured overlays: £5 each
  • Scotopic sensitivity syndrome assessment only: £160
  • Scotopic sensitivity syndrome assessment with report: £320

The option to purchase a report can be made immediately following the assessment.

Scotopic sensitivity syndrome causes difficulty with reading printed text and can be helped through the use of tinted lenses or coloured overlays. To book a scotopic sensitivity syndrome assessment or to find out more please contact us now to talk to member of our team.


Contact us

Ready to get started? The next step is to speak to our team to find out more about the services we provide and how we can help. Call us on 0161 820 9229 or email office@hsrpsychology.co.uk

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