A 58-year-old man from Mumbai presents with sudden onset of floaters and photopsia in his right eye for 2 days. He is highly myopic (−8 D) and has a history of lattice degeneration. On examination, visual acuity is 6/60 in the right eye. Fundoscopy reveals a superior temporal retinal detachment with a single horseshoe tear. The macula is still attached. What is the most appropriate immediate management?