Blue/dark vision It is a symptom produced in fifth impulse of poisoning which means that ones vision becomes blue or in dark color. :
नीलादीनां तमसश्च् दर्शनं ( nīlā dīnāṁ tamasashc darshanaṁ )Meaning: Blue/dark vision It is a symptom produced in fifth impulse of poisoning which means that ones vision becomes blue or in dark color.
