“…Currently, no effective treatment is available for TON ( Chaon and Lee, 2015 ; Singman et al, 2016 ; Yan et al, 2016 ). The clinical treatment options for TON include observation (conservative management), high-dose corticosteroid treatment, or surgery (optic canal decompression), which are based on studies on small patient cohorts ( Goldberg and Steinsapir, 1996 ; Yu-Wai-Man and Griffiths, 2013 ; Yan et al, 2016 ; Yu et al, 2016 ; Kashkouli et al, 2017 ). In comparative nonrandomized studies on the treatment outcomes in patients with TON, the results showed no clear effect of either hormonal therapy or surgical treatment ( Levin et al, 1999 ; Carta et al, 2003 ).…”