Numberless other channels issuing from that principal one extend into every part of the body and bearing the element of heat cause the sense of vision (and the rest).
सर्वगात्रप्रतायिन्यस्तस्या ह्यनुगताः शिराः। नेत्रयोः प्रतिपद्यन्ते वहन्त्यस्तैजसं गुणम्॥