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Impairment simulator software

The vision and hearing impairment simulator is an installable application that enables you to:

  • Apply simulated vision impairment to your own images, or any third party program running on your computer.
  • Export the results to an image file, ready to insert into a presentation.
  • Listen to audio clips with simulated hearing impairment.

Simulating impairment helps to learn about the different vision conditions, and communicate the corresponding real-world issues to others.

This software is currently only available on Windows.



We are now supplying activation codes for this software free of charge, and you can use the feedback form at the bottom of this page to request one of these codes. We aim to respond within 5 working days.

The following news articles showcase people’s use of this impairment simulator software:


Helping designers to understand user needs in industrial packaging

It can take a lot of time for people with visual impairments to understand information on packaging. They often need to resort to methods such as using mobile phone software to read out the information to them. This can reduce their willingness to use a product.

Researchers at the National Cheng Kung University in Taiwan used Cambridge University's impairment simulator software to help improve this situation. They found that information on commercial beverage packaging was often difficult for older people and those with visual impairments to read. They then applied inclusive design principles to explore ways to improve the information presentation using colour and tactile additions to standard packaging.

For more information on this project, please contact San-Wen Hu at p37031093@gs.ncku.edu.tw

Exploring user requirements in clock design

Product design students at Aston university were tasked with designing a clock face on the theme of ‘time passing’. The designs were required to be brand orientated and students had to identify a range of potential ‘fictional’ users that represented the target market for their product.

An important aim was that the students learn that the choice when buying a clock is not only influenced by how it represents the brand, but by the user experience of telling the time. To aid with this, the fictional users were given real life learning conditions and physical characteristics, such as visual impairments.

Students used Cambridge University’s impairment simulator software to evaluate their development sketches before developing them to a final design. They found that the software was extremely useful in terms of understanding how areas of the clock face could be obscured and unreadable, depending on the users’ visual conditions. Using these insights, students reviewed details of their designs, thereby better satisfying a broader range of user requirements within the target market.

The simulation software helped the students understand the need to have empathy towards and accommodate a wider range of physical characteristics apart from their own ”

- Elaine Mackie, Lecturer