A 68-year-old man from rural Maharashtra presents with gradual painless vision loss over 2 years. On examination, he has a white opacity in the lens nucleus with a brown discoloration. He denies trauma, systemic disease, or medication use. His visual acuity is 6/60 in both eyes. What is the most appropriate next step in management?

Explanation

## Clinical Context This patient has a **nuclear sclerotic cataract** (brown discoloration of nucleus is pathognomonic) with significant functional impairment (VA 6/60). The cataract is mature or approaching maturity, and spectacle correction has limited utility. ## Why Phacoemulsification is the Next Step **Key Point:** Once a cataract causes visual disability (typically VA worse than 6/12) and the patient is motivated for surgery, cataract extraction is the definitive and only effective treatment. **High-Yield:** The timing of cataract surgery is determined by: 1. **Patient's functional need** — can they perform daily activities? 2. **Visual acuity threshold** — traditionally 6/12, but individualized 3. **Absence of contraindications** — healthy eye, no posterior segment pathology **Clinical Pearl:** In this case: - VA of 6/60 is well below the functional threshold - No evidence of posterior segment disease (no mention of diabetic retinopathy, macular degeneration, etc.) - Nuclear sclerotic cataracts are **not reversible** — no medication or laser can restore lens clarity - Phacoemulsification is the gold standard for modern cataract surgery ## Why Other Options Fail | Option | Why Incorrect | |--------|---------------| | Spectacles | Nuclear sclerosis causes refractive index changes; high-power correction provides minimal benefit and is not the standard of care for mature cataracts. Waiting 6 months delays necessary surgery. | | YAG laser capsulotomy | Used for **posterior capsular opacification** (after cataract surgery), not primary nuclear cataracts. Laser cannot clear a sclerosed nucleus. | | Corneal topography/OCT | No clinical indication. The diagnosis is clear (nuclear cataract). These tests would only be relevant if posterior segment pathology were suspected, which is not suggested here. | ## Management Algorithm ```mermaid flowchart TD A[Cataract with visual symptoms]:::outcome --> B{Visual acuity < 6/12?}:::decision B -->|Yes| C{Posterior segment pathology?}:::decision B -->|No| D[Optimize refraction, review]:::action C -->|No| E[Cataract surgery indicated]:::action C -->|Yes| F[Investigate posterior segment first]:::action E --> G[Phacoemulsification]:::action F --> H[Manage underlying disease]:::action H --> I{Vision limited by cataract?}:::decision I -->|Yes| G I -->|No| D ``` **Key Point:** Surgery is indicated when cataract is the primary cause of visual disability and the patient desires improvement.