The investigators compared the incidence of trimming-induced retinal breaks, retinal redetachment rate, and final LogMAR BCVA; between scleral self-indentation and non-indentation during chandelier-assisted peripheral vitrectomy under air for eyes with primary retinal detachment. Self-indentation enables complete trimming of the vitreous base without causing iatrogenic retinal breaks, with a higher retinal reattachment rate, and with less need for chandelier shift than with non-indentation approach.

Retrospective cohort study. One hundred and thirty eyes of 130 participants with primary rhegmatogenous retinal detachment were identified. All the participants had undergone a chandelier-assisted peripheral vitrectomy under air. Scleral self-indentation had been used in 68 eyes (study group) (Indentation group), while non-indentation had been used in 62 eyes (comparison group) (Non-indentation group). Outcome variables included: Trimming-induced retinal breaks (TIRB), retinal redetachment rate, final LogMAR BCVA, and intraoperative complications.

Inclusion Criteria:

- RRD with postoperative follow up > 3 months, without PVR, or with PVR A-B

Exclusion Criteria:

• RRD with less than 3 months of postoperative follow-up,
• RRD with proliferative vitreoretinopathy grade C (PVR C),
• RRD with uveitis,
• RRD with choroidal detachment,
• Giant retinal tears,
• Retinal dialysis,
• Myopic macular hole RRD,
• Traumatic RD,
• Children < 16 years old,
• The later vitrectomy (if vitrectomy had been performed for RRD in both eyes)

This is a retrospective cohort study that was done on eyes (participants) with rhegmatogenous retinal detachment (RRD) for whom chandelier-assisted peripheral vitrectomy under air (CPVA) had been performed; whether using scleral self-indentation (Exposure), or without scleral self-indentation (control)