As the leader in manufacturing Gold Standard contrast sensitivity charts, Precision Vision released the new APEX2.5, taking contrast sensitivity testing to a new level! This test delivers unmatched accuracy to +/- 0.01 Log CS tolerance for each letter, a contrast range from 0.05 LogCS to 2.50 LogCS and a change of 0.05 LogCS for each letter. With 50 contrast steps on each chart, the APEX2.5 offers unrivaled quality, precision and test range. This test is administered at a near distance (nominally at 40cm) and presents well with a table-top chart stand (sold separately). The APEX2.5 is sold as a set of 3 charts and may be customized (please inquire for a quote if you require different optotypes), to offer you more flexibility with different patient populations. Product Features Highest Contrast (LogCS) 0.05 LogCS Lowest Contrast (LogCS) 2.50 LogCS Frequency of contrast changes 0.05 logCS every letter Number of contrast steps on chart 50 Tolerance (LogCS) per Letter +/- 0.01 M Letter Size & Snellen Acuity at 40 cm M 12.5 : 20/625 Letters per Row 5 Optotypes Sloan Letters Ability to Customize (additional optotypes available) Yes, contact Precision Vision Printed Notations logCS and Weber % contrast Increment measures 0.05 Luminance (cdm/Lux) 85 cd/m2 (60-120cd/m2) (189-377 Lux)
