Cardiff Acuity Test Set™ with 36 cards and occluding glasses An upgrade for the Cardiff Acuity Test™ is now offered to meet the differing needs of Pediatric vs. Low Vision patients (Item #: NCATSLVU). The Low Vision upgrade kit includes a set of 3 cards each of levels A, LVB and LVA plus three red dividers. The standard set covers 12 acuity levels from 20/160 to 20/12.5. This version also include a pair of 4608R Butterfly foamy occluding glasses. The Low Vision set covers 14 levels from 20/320 to 20/12.5. There are three cards at each of these acuity levels. Intended for test distances of 1 meter and 50 cm. Cards are laminated and measure 7 3/4 by 10 1/2 in (20 by 27 cm) and are labeled by acuity level equivalents in decimal, meters, feet, Snellen and LogMAR for both test distances.