Metropsis research edition
A complete toolbox for psychophysical assessment of visual function
Fast, accurate and more sensitive than standard tests
For normal, defective, paediatric, ageing and low vision populations
Metropsis is a complete toolbox
Metropsis is a complete test suite suitable for clinical, pre-clinical, drug trials, screening, sports science, applied vision and human factors research. Choose from a wide range of tests, including protocols designed for normal, paediatric, ageing and low vision populations – or we can develop a custom test for your project.
for faster more precise assessment of visual function
Metropsis is more sensitive than standard charts: ideal for investigating diseases of the eye and brain, as well as secondary effects of systemic disorders, such as cardiovascular disease or neurological function.
The research edition includes Metropsis Display++ technology (the screen displaying the ETDRS chart above) with a unique integrated sensor system, enabling the display to self-calibrate in real time. So you can be sure that your results are reliable and repeatable – even when performing long-term studies using multiple Metropsis systems across different sites.
trusted worldwide
Metropsis research edition is currently being used in clinical trials and natural history studies in research centres worldwide, including:
- Moorfields Eye Hospital, London
- Nuffield Laboratory of Ophthalmology, Oxford
- National Eye Institute, Bethesda
- Johnson & Johnson Vision Care
- Department of Clinical Neurosciences, University of Cambridge
- Kobe Eye Centre
- Tokyo Medical Centre
- L V Prasad Eye Institute, Hyderabad
- Kellogg Eye Centre, Ann Arbor
- Institut de la Vision, Paris
- Institute for Ophthalmic Research, Tubingen
- Emory Eye Centre, Atlanta
- Department of Ophthalmology, University of Colorado
- Department of Medicine and Optometry, Linnaeus University
- Faculty of Medicine, University of Coimbra
- University of Pennsylvania
- University of Nevada, Reno
- Azienda Ospedale Universita’ Padova
- University of Latvia
- Karolinska Institutet, Stockholm
- Technological University Dublin
precision Display++ technology
One of the key elements of Metropsis research edition is the calibrated 32” LCD Display++ Monitor, designed and manufactured exclusively by Cambridge Research Systems and used in hundreds of research labs (see some recent Display++ references below). Display++ makes it easy to display calibrated visual stimuli with precision timing and provides excellent control of colour and contrast.
Reliable stimulus presentation
Off-the-shelf LCD panels suffer from large colour and luminance fluctuations. This may be acceptable for screening tests, but general purpose LCD displays are unsuitable for precision testing. Novel hardware corrections developed by our Staff Scientists ensure that Display++ reliably presents calibrated test patterns on every trial.
Highly accurate colour reproduction and spatial uniformity
Display++ reproduces colours with high accuracy (average CIE DE2000 < 0.3) and high spatial uniformity (over 95%) across the screen area. It offers up to 16-bits per channel colour resolution, which will allow the investigator to obtain very fine contrast levels.
Self-calibrating monitor
Display++ is calibrated at the factory and maintains its calibrated light output thanks to a built-in light sensor. The sensor is isolated by the ambient light, so changes in the ambient light will not affect the calibration of the monitor.
- Wide Field display: 32″ 1920×1080 IPS LCD with 120Hz panel drive and 5ms grey-to-grey response time
- Deep Colour technology: supports in excess of 1 billion colours. 10-bit RGB native, configurable up to 16-bit using temporal dithering algorithms
- High Brightness: Peak white output up to 350cd.m-2
- High Contrast: typically 1400:1 after full factory calibration settings have been applied
- HDMI 1.4 input: supports 16:9 video modes 1920×1080 @ 120Hz and 1920×1080 @ 100Hz
- Integrated colour sensor for real time luminance calibration. Ensures accurate light output, regardless of the effects of ageing
- Hardware gamma correction tables and bespoke CRS CIE XYZ colour management system ensure accurate colour reproduction over the entire gamut
- Individual unit factory calibration with full colorimetric and spectroradiometric calibrations included (units are delivered with “gamma corrected” linear light output at 120 cd.m-2 and CIE XYZ colour reproduction better than 1 Delta-E across full scale range
- sRGB colour calibrated Monitor video mode for presentation of HD video and photo
- Light output is synchronous and lag-free
- Strobing LED backlight to minimise transition artefact
- Multiple synchronous TTL trigger outputs (11 bits in, 11 bits out in total: 10 bits in, 10 bits out on DB25 connector; dedicated Trigger In and Trigger Out on BNC connectors).
- Integrates with audio, eye tracking and behavioral response devices, and compatible with solutions from vendors (e.g. equipment for recording EEG/ERPs, eye trackers, neurophysiological amplifiers, equipment for recording evoked potentials, TMS stimulators).
References
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Ghodrati, M., Zavitz, E., Rosa, M. G., & Price, N. S. (2019). Contrast and luminance adaptation alter neuronal coding and perception of stimulus orientation. Nature communications, 10(1), 941.
DiMattina, C., & Baker, C. L. (2019). Modeling second-order boundary perception: A machine learning approach. PLoS computational biology, 15(3), e1006829.
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Braun, D. I., Schütz, A. C., & Gegenfurtner, K. R. (2017). Visual sensitivity for luminance and chromatic stimuli during the execution of smooth pursuit and saccadic eye movements. Vision research, 136, 57-69. doi.org/10.1016/j.visres.2017.05.008
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