The Cardiff Acuity Tests are designed especially for the hard to test age group, 12 months to 30 months. It uses familiar pictures and a procedure in the form of a game to attract and keep the attention of young children. It relies on the technique of “preferential looking” – that is, the observer simply notes the child’s eye movements to determine whether he or she can see the picture.The test is also useful for testing adults with a severe learning disability and those with reduced cognition or decreased consciousness.
The standard version covers a range of visual acuity levels from 6/48 and 6/96 to 6/3.75 and 6/7.5 (at working distances of 1 metre and 50 cm).
The Cardiff Contrast Test uses the same vanishing optotypes to measure contrast sensitivity by preferential looking, or by naming the picture seen. It is suitable for use from around 12 months to adult. The picture targets are drawn with dark and light bands on a neutral grey background. When the person’s contrast sensitivity level is reached the target merges with the grey background and becomes invisible. There are three cards at each contrast level from 46% to 1% in twelve stages. The testing distance is 1 metre or less.
Full testing instructions and expected age-related values are included.
We also offer a replacement box for the Standard Cardiff Acuity Test.
Kay Pictures is a licensed distributor for the Cardiff Vision Tests.