• Conduct CSF testing at 18, 12, 6, 3 and 1.5 cycles-per-degree at either photopic or mesopic luminance levels
  • Contrast levels start at 0.3 log units above normative data allowing for expedited test time
  • Rotationally symmetric and randomly presented optotypes eliminate bias from the patient with non-rotational symmetric optical aberrations such as residual astigmatism, coma, trefoil, etc.
  • Replaces existing testing methods that are biased for with-the-rule aberrations such as vertical astigmatism, vertical coma, and biased against aberrations such as against-the-rule and horizontal coma
  • The system is precisely calibrated for both distance-to-subject and pixels-per-inch so that optotypes precisely follow ANSI Z80.21-2020 and ISO 8596:2017 regarding size
  • Background luminance is standardized and calibrated to 85 cd/m2 to comply with ANSI and ISO testing, with certification on brightness, contrast and color temperature
  • The system is designed with the maximum reponse time to eliminate the focusing effect and predetermined screen blanking time, and to allow the retina to refresh between displays
  • Average test time is less than 5 minutes per eye
  • Test time can lower to 2-3 minutes for existing patients by starting at 0.3 log units above previously stored values
  • Test results can be exported to any media file in any format for statistical analysis


  • The system is controlled by a high resolution tablet via a standard Bluetooth connection utilizing our CustomLink® technology
  • The testing mechanism interfaces seamlessly with CTS (Clinical Trial Suite) to allow the technician to follow the protocol as determined by the sponsor
  • The test begins with a two-entry training phase where the system will present a sinusoidal bullseye, then a blank disk, to ensure user and subject understanding
  • Based on the subject’s response, the technician presses the appropriate display and the training phase completes after both images have been entered correctly
  • The algorithm begins with preselected cycles-per-degree and the subject simply indicates whether they see the bullseye or not (blank)
  • Based on the subject’s response, the technician presses the bullseye or blank on the tablet
  • The algorithm advances until threshold is determined and then begins the next required cycle-per-degree as mandated by the sponsor protocol
  • Threshold is determined through each cycle, then presented at the completion of the protocol with a graph and normative data
  • Data can then be exported to any file for collection and interpretation


M&S Smart System® 20/20 USA All-in-One Computer

  • High-resolution 22” display
  • Designed and developed by M&S in Niles, IL
  • Manufactured in the USA (applies to SS-2020-USA)
  • Industrial grade componentry ensures longer product lifespan compared to computers built for the retail/consumer market
  • USA technical support based in-house at M&S in Niles, IL
  • Extended 3-year warranty

Touch-Screen Laptop

  • High-resolution 13” display
  • Lightweight and portable
  • USA technical support based in-house at M&S in Niles, IL
  • 2-year warranty