A 42-year-old woman with high myopia (−10 D) presents with sudden onset of multiple floaters and photopsia in her left eye. Visual acuity is 6/6. On dilated fundoscopy, a horseshoe-shaped tear is seen at the superior temporal periphery with a small area of retinal elevation adjacent to the tear. The macula is flat and uninvolved. There is no evidence of vitreous hemorrhage or PVR. What is the most appropriate management?

Explanation

## Clinical Presentation Analysis This patient has **acute rhegmatogenous retinal detachment (RRD)** with favorable prognostic features: - **Tear morphology:** horseshoe-shaped tear (high-risk tear type) - **Detachment extent:** small, localized elevation adjacent to tear only - **Macula status:** flat and uninvolved (macula-on RRD) — excellent prognosis - **Clarity:** no vitreous hemorrhage or PVR - **Risk factor:** high myopia (−10 D) ## Why Pneumatic Retinopexy is Correct **Key Point:** Pneumatic retinopexy is the **first-line treatment for macula-on RRD** with a single break in the superior or temporal quadrant, no PVR, and good media clarity. **High-Yield:** Pneumatic retinopexy indications (PVR classification): - **Macula-on status** (best visual prognosis) - **Single retinal break** or breaks within one quadrant - **Break located in superior half** of eye (gas bubble naturally rises) - **No proliferative vitreoretinopathy (PVR)** - **Clear media** for visualization - **Patient able to comply** with strict head positioning **Clinical Pearl:** Why pneumatic retinopexy over vitrectomy in this case: 1. **Simpler procedure** — less invasive, faster recovery 2. **Preserves vitreous** — important in young, myopic patients 3. **Macula-on status** — excellent anatomical and functional outcomes (>90% final visual acuity ≥6/12) 4. **Single superior break** — gas bubble provides natural tamponade ## Operative Technique ```mermaid flowchart TD A[Macula-on RRD with horseshoe tear]:::outcome --> B[Pneumatic Retinopexy]:::action B --> C[Laser photocoagulation around break]:::action C --> D[Intravitreal gas injection<br/>SF6 or C3F8]:::action D --> E[Prone positioning<br/>2-3 weeks]:::action E --> F{Retinal reattachment?}:::decision F -->|Yes| G[Gradual gas resorption<br/>Retina remains attached]:::outcome F -->|No| H[Rescue vitrectomy]:::action ``` ## Comparison: Pneumatic Retinopexy vs. Scleral Buckle vs. Vitrectomy | Feature | Pneumatic Retinopexy | Scleral Buckle | Vitrectomy | |---------|----------------------|-----------------|------------| | **Best for** | Macula-on, single superior break | Macula-off, multiple breaks, inferior breaks | PVR, vitreous hemorrhage, complex cases | | **Invasiveness** | Least invasive | Moderately invasive | Most invasive | | **Vitreous preservation** | Yes | Yes | No | | **Reattachment rate** | 80–90% primary | 85–95% primary | 95%+ primary | | **Final VA** | Best (macula-on) | Good | Variable | | **Positioning required** | Strict, 2–3 weeks | None | Minimal | | **Myopia change** | Minimal | Induced myopia | Variable | **Why NOT Scleral Buckle:** - While effective, scleral buckle is less ideal in high myopia because it induces further myopic shift - Pneumatic retinopexy is preferred for macula-on cases with superior breaks - Scleral buckle is reserved for inferior detachments or when pneumatic retinopexy fails ## Why Other Options Fail | Option | Reason for Rejection | |--------|----------------------| | Vitrectomy + silicone oil | Unnecessarily invasive for a macula-on, uncomplicated RRD. Vitrectomy is reserved for PVR, vitreous hemorrhage, or failed simpler procedures. | | Scleral buckle | While effective, induces myopic shift in a patient already −10 D. Pneumatic retinopexy is preferred for superior breaks in macula-on cases. | | Observation | **Contraindicated** — any acute RRD requires urgent intervention. Observation risks macula involvement, PVR development, and permanent vision loss. | [cite:Parson's Diseases of the Eye 22e Ch 12]