A similar test for night-blindness should be arranged in subdued light.
At a different point in the code, perhaps where operations are dispatched or at the start of each operation, a similar test is made.
Ireland is conducting a similar test and the news is not that encouraging; its GDP fell by 2.3% in the fourth quarter of 2009. In Latvia, the pain has been even greater; its GDP fell by 18% last year.
