At the entrance, chiles were advertised as «vi agra for the poor.» (fieryfoodscentral.com)
Vitamin B3 deficiency lasting for few months [7] causes pellagra (Italian pella agra = rough skin) with «four D» symptoms: dermatitis with burn - like blisters and later rough, scaly and painful, but not itchy, lesions on the sun - exposed areas (face, extension side of the hands / arms and leg / feet), diarrhea, dementia and death (if not treated)[1]. (nutrientsreview.com)
Another possibility is to focus the gaze at the tip of the nose in Nasikagra Drishti, another common gaze for meditators looking to go deep; here nasa means nose and agra meas the foremost point, which, in this case, is the tip of the nose. (fivepillarsyoga.com)