As part of a National Institute of Health Research (NIHR) funded study, in association with Moorfields Eye Hospital Foundation Trust, UCL Institute of Ophthalmology and the University of Ulster, optometrists are being invited to take part in a usability study for a novel perimetry device.

The Moorfields Motion Displacement Test (MMDT) is a laptop-based perimeter that has drawn great interest from glaucoma specialists worldwide due to its low cost, high sensitivity and specificity to glaucomatous defects, robustness to media opacities, in addition to the relative speed of screening tests (approx. 90 seconds per eye) compared with other commercially available instruments. The MMDT has also been recognised by the Medical Research Council winning the Translational Research Innovation award in 2008 and now has MHRA approval. In contrast to standard automated perimetry, the MMDT utilises 31 line stimuli placed at preselected locations in the central 30° of the visual field. These stimuli oscillate during the test with the observer’s task being to indicate when a line is seen to move by pressing a response button. More detailed information on the device may accessed at
To determine the ease of use of the MMDT instrument for practitioners in a primary care setting, optometrists in Northern Ireland are invited to test the MMDT device.

Feedback on the user interface, in addition to patient opinion, will be gained through a short questionnaire.
Expressions of interest in taking part in this survey, or any questions relating to the MMDT device, may be directed to Prof. David Garway-Heath.
Prof. David F. Garway-Heath
IGA Professor of Ophthalmology, UCL Institute of Ophthalmology, London
Hon. Consultant Ophthalmologist, Moorfields Eye Hospital NHS Foundation Trust, London
Visual Assessment and Imaging Theme Leader, National Institute for Health
Research Biomedical Research Centre at Moorfields Eye Hospital and UCL Institute of Ophthalmology, London