A 58-year-old man presents with sudden onset of floaters and flashing lights in his right eye for 2 days, followed by a shadow in the superior temporal visual field that is progressively descending. He has a history of myopia (−8 diopters) and underwent cataract surgery 3 years ago. On examination, visual acuity is 6/12 in the right eye. Dilated fundoscopy reveals multiple retinal breaks with subretinal fluid extending inferiorly. The macula is still attached. What is the most appropriate immediate management?

Explanation

## Clinical Presentation & Diagnosis This patient has **rhegmatogenous retinal detachment (RRD)** with the following key features: - **Risk factors**: high myopia, previous cataract surgery (aphakic/pseudophakic eye) - **Symptoms**: acute floaters, photopsia (flashing lights), shadow/visual field defect - **Exam findings**: retinal breaks with subretinal fluid, macula still attached (macula-on RRD) - **Progression**: superior-temporal break with inferior spread (gravity-dependent) ## Management Principles for Macula-On RRD **Key Point:** Macula-on RRD is a **surgical emergency**. The goal is to reattach the retina before the macula detaches, which would result in permanent vision loss. **High-Yield:** The presence of retinal breaks (not just bullae) confirms rhegmatogenous RRD and mandates urgent surgical intervention, not observation. ## Why Vitreoretinal Surgery is Correct | Feature | Macula-On RRD | Macula-Off RRD | |---------|---------------|----------------| | **Urgency** | Within 24–48 hours | Still urgent, but slightly less time-critical | | **Visual prognosis** | Excellent if operated promptly | Guarded; depends on duration of detachment | | **Surgical approach** | PPV ± scleral buckle (PPV preferred in modern practice) | PPV ± buckle; may need additional techniques | | **Outcome** | >90% achieve macula-on status if operated early | Vision recovery slower and less complete | **Clinical Pearl:** In modern vitreoretinal practice, **pars plana vitrectomy (PPV)** is the preferred primary approach for most RRD cases, especially in pseudophakic/aphakic eyes and those with multiple breaks. Scleral buckle may be added if needed. ## Why Other Options Are Incorrect 1. **Gas bubble alone** (option 0): Gas tamponade without addressing the underlying break and without vitrectomy is insufficient. Gas alone cannot close the break; it only provides temporary support. PPV is needed to remove vitreous traction, visualize and treat all breaks, and achieve definitive reattachment. 2. **Observation with bed rest** (option 2): Observation is contraindicated in macula-on RRD. Delaying surgery risks progression to macula-off status within hours to days. Bed rest alone cannot halt the detachment process. 3. **Argon laser photocoagulation** (option 3): Laser is used for **prophylactic treatment of retinal breaks without detachment** (e.g., lattice degeneration, asymptomatic breaks). Once subretinal fluid is present (indicating active detachment), laser cannot reattach the retina. Vitrectomy is mandatory. ## Surgical Decision-Making Algorithm ```mermaid flowchart TD A[Rhegmatogenous RRD diagnosed]:::outcome --> B{Macula attached?}:::decision B -->|Yes| C[Macula-on RRD]:::outcome B -->|No| D[Macula-off RRD]:::outcome C --> E[Urgent surgery within 24-48 hrs]:::action D --> F[Urgent surgery, but slightly less time-critical]:::action E --> G{Pseudophakic/aphakic?}:::decision G -->|Yes| H[PPV ± buckle preferred]:::action G -->|No| I[Buckle vs PPV based on break location]:::action F --> J[PPV ± buckle]:::action H --> K[Reattachment achieved]:::outcome I --> K J --> K ``` **Mnemonic: PVD-RRD** — **P**ars plana **V**itrectomy is the **D**efinitive treatment for **R**hegmatogenous **R**etinal **D**etachment in modern practice.