Farce
The Isihara cards test result was at my initial medical, deemed insufficient and I was then referred for the Holmes Lantern test, that test was difficult, and although I passed, I often reflect on what might have been; a colour VDL restriction. No Class I.
Imagine my surprise when visiting an optician I was given the all clear on Isihara; this backs up comments made above.
The whole thing lacks credibility in my view as the number of plates shown to the patient for the type of colour blindness I was alleged to possess before that was deemed satisfactory under holmes, was low 2 plates maybe 3 and in uncontrolled lighting - the whole thing doest stack up not enough evidence and varying test conditions make it a bit of a farce....