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15/02/2020 5:22 pm
Hi Bob Sir. One of my friends recently sat the ATPL HPL exam, he passed however he brought back a question that has left me confused and I'm sitting my exam soon. The question goes: For a smoker, degradation of night vision usually begins at:
(A) 2000
(B )4000
(C) 8000
(D) Ground Level
**reason for confusion is that I know night vision deteriorates at 4000 ft, however, is that for a normal person & is so then would a smoker have a night vision deterioration at a lower altitude or same altitude?
