Perbedaan Pengaruh Lampu Meja Light Emitting Diode(LED) Invisible Flicker dengan LED Visible Flicker Terhadap Asthenopia = Comparison of The Effects of Invisible Flicker to Visible Flicker Light Emitiing Diode(LED) Desk Lamp on Asthenopia - Amelya Permata Sari, author (2020)