Rhegmatogenous Retinal Detachment with Horseshoe Tear

A 58-year-old male high myope (-8.50 D) presents with 24 hours of photopsia and a shower of floaters in the right eye, followed by a curtain descending over the superior visual field. Visual acuity has dropped from 6/6 to 6/60. Slit-lamp examination reveals pigment cells in the anterior vitreous (Shafer's sign). Fundoscopy with scleral indentation demonstrates the structure marked **D** in the diagram. Which of the following is the most appropriate immediate management for this acute macula-on rhegmatogenous retinal detachment?

A 62-year-old highly myopic man (myopia −8.5 D) presents with sudden onset of floaters, photopsias, and a progressive superior curtain-like visual field defect in the right eye for 18 hours. Dilated fundus examination reveals a corrugated bullous elevation of the retina in the superotemporal quadrant with loss of choroidal pattern. The structure marked **A** in the diagram shows a U-shaped tear with the flap pointing toward the vitreous base at the equatorial region. Which of the following best describes the PRIMARY PATHOPHYSIOLOGIC MECHANISM that led to the formation of this tear?