APEX 2.5 Contrast Sensitivity Test
As the leader in manufacturing gold standard contrast sensitivity charts, Precision Vision has developed the new APEX2.5, taking contrast sensitivity testing to a new level! Unmatched precision and contrast range make this the newest and most comprehensive contrast sensitivity test available.
$385.00
Product Variations
Description
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) |
