Hi, At my local opticians I have been given the ishihara test in the past and failed and I was wondering if there were any statistics on whether most people who fail the isihara plates fail the lantern test?
Also, do people ever buy copies of the test to get used to the plates, is it unwise in terms of serious implications of 'cheating' or is it accepted that people want to reassure themself beforehand by practising so you know what to expect?