This science is called Chakshushi. It was taught by Manu to Soma. Soma taught it to Vishvavasu, Vishvavasu, taught it to me.
चाक्षुषी नाम विद्येयं यां सोमाय ददौ मनुः। ददौ स विश्वावसवे मम विश्वावसुर्ददौ॥