ABI CET clarification.
The article on Acquired brain injury: part 2'(April 19, p58-62) suggests that Cardiff Acuity Cards can be used for acuity measurement in patients. Please note that the test is called the Cardiff Acuity Test and has never been called 'Cards.
The illustration (figure 2) in that article is of the Cardiff Contrast Test and has as the caption 'The Cardiff (Contrast) Acuity Cards Test.' Readers should be made aware that there are two separate tests; the Cardiff Acuity Test which measures acuity and the Cardiff Contrast Test which measures contrast sensitivity.
Both might be useful in the assessment of a patient with brain injury, but each measures a very different aspect of vision and the two should NOT be confused.
J Margaret Woodhouse, senior lecturer and optometrist, Cardiff