Natyashastra
विलुप्ता चपलोन्माददुःखार्तिमरणादिषु । आकेकरा दुरालोके विच्छेदप्रेअक्षितेषु च ॥ ९५॥
The Viplutā (disturbed) gaze is used in instability, madness, sorrow, affliction, and death. The Ākekarā (half-shut) gaze is used in looking at distant objects, separation, and during consecration.
english translation
viluptA capalonmAdaduHkhArtimaraNAdiSu । AkekarA durAloke vicchedapreakSiteSu ca ॥ 95॥
hk transliteration by Sanscript