Our approach is based on using scientific and public health methods to determine the greatest needs and barriers to change then trialling and testing solutions to ensure we are effectively reducing these barriers.

Peek began as a project at the International Centre for Eye Health (ICEH), a research and education group based at the London School of Hygiene & Tropical Medicine (LSHTM). ICEH work to improve eye health and eliminate avoidable visual impairment and blindness, with a focus on low-income populations. Many of the individuals leading country prevention of blindness programmes or working in eye care or disability non-governmental organisations (NGOs) have come through the ICEH. Since spinning out in 2015, we continue to work closely together on research, teaching and dissemination of information, ensuring evidence underpins our work and that we are able to serve the needs of the many brilliant people serving their communities.



Measuring vision provides a vital indicator of eye health and general health. It helps us decide who needs specialist review, who needs treatment, and how successful the treatment is. There are multiple forms of vision including acuity (central vision), contrast, colour, and visual fields (peripheral vision). We also help patients and carers understand vision test scores using vision simulations.

Peek Red

The red desaturation test is used by eye health professionals as a way of subjectively testing for a relative difference in red appreciation between the patient’s two eyes. A red pen top or bottle top is often used. Although a helpful test for assessing optic nerve function, it doesn’t allow for any measure of difference between the two eyes or change over time. Peek Red -currently in testing and validation – will enable a more objective measure of this.

Peek Colour

Colour vision testing is useful for detecting hereditary colour blindness, a common condition which often goes undiagnosed. There are various types of colour vision defects and each affect people differently.  For example, not being able to differentiate certain colours can be a problem if the patient is working as an electrician or trying to navigate the London underground map. We are building a simple, user-friendly test to help identify common colour deficiencies.  We will link this to a Peek Colour Simulator to help others understand the patient’s visual world and to allow the patient to use the simulator to differentiate between colours which can’t normally be seen by people with colour blindness. This test is still being designed and will need to undergo validation work prior to preparation for release. If you are colour blind and would be interested in participating in studies, please contact us.

Peek Contrast

Although visual acuity is the most well-recognised measure of a person’s vision, we recognise that acuity is a high contrast black on white test. Detection of contrast levels provides additional information of visual status and optic nerve function that further supports our understanding of how someone can see. Many people with low contrast sensitivity struggle with daily visual functions, despite some having good acuity. Peek Contrast will provide an easy to use, accurate and validated way of measuring contrast sensitivity with intuitive results.


Eliminating Blindness in Trans Nzoia County, Kenya

The initial validation studies of Peek Acuity and Peek Retina took place in Nakuru, Kenya. Integration of Peek Acuity in to School Eye Health and Community Eye Health solutions are run in Kitale, Kenya, led by Dr Hillary Rono.

School Eye Health in India

In partnership with the Public Health Foundation India, we have run and completed a cluster randomised control trial on Peek School Eye Health. We are also working together validating Peek Retina in a diabetic retinopathy workflow.

Peek Diabetic Retinopathy Screening in Tanzania

Peek Diabetic Retinopathy Screening in India

Validating Peek Retina for Malaria Retinopathy in Mali

The testing of Peek Acuity, Contrast, Fields and Disc Imaging for Glaucoma in Tanzania

The testing and Validation of Peek Contrast in Ethiopia

Peek School Screening in India: A Cluster Randomised Control Trial

Peek School Screening in Kenya: A Cluster Randomised Control Trial

Sign up for the latest news and updates


Peek Vision Head Office, 1 Fore St, London EC2Y 9DT UK

Peek, Peek Acuity and Peek Retina are trading names of Peek Vision Ltd, a registered company (09937174) in England and Wales.

Peek Vision Ltd is 100% owned by The Peek Vision Foundation (registered charity number 1165960), a company limited by guarantee registered in England and Wales (company number: 9919543). Registered office: Kings Parade, Lower Coombe Street, Croydon, Surrey, England, CR0 1AA.