Astanga Hrudaya
नेत्रयोर्बाह्यतोऽपाङ्गौ भ्रुवोः पुच्छान्तयोरधः। तथोपरि भ्रुवोर्निम्नावावर्तावान्ध्यमेषु तु॥३१॥
At the outer angle of the eye, at the tail end of the eyebrows and below are the two apanga. In the depression above the eyebrow (on the forehead) are the avarta; injury to these (apanga and avarta marmas) causes either blindness or disorders of vision.
english translation