A 35-year-old woman from Delhi presents with progressive blurred vision and glare for 6 months. On slit-lamp examination, she has a posterior subcapsular cataract (PSC) with VA 6/18 in the affected eye. She reports no systemic disease, no steroid use, and no family history of early cataracts. On dilated fundus examination, the posterior segment is normal. What is the most appropriate next step in management?

Explanation

## Clinical Context This patient has a **posterior subcapsular cataract (PSC)** with: - Functional impairment (VA 6/18) - No identifiable systemic cause (no steroids, no family history) - Normal posterior segment on dilated examination - Significant symptoms (glare, blurred vision) ## Why Counseling and Informed Consent is the Next Step **Key Point:** Once a cataract causes functional disability and systemic/metabolic causes are reasonably excluded, the next step is **patient counseling and informed consent for surgery** — not further investigation or medical therapy. **High-Yield:** PSC cataracts are unique because they: 1. Cause **disproportionate glare and visual dysfunction** relative to their density 2. Progress **unpredictably** — some remain stable, others progress rapidly 3. Are **NOT reversible** with medication or topical therapy 4. Have a **clear surgical indication** once functional impairment is present **Clinical Pearl:** The dilated fundus examination showing a normal posterior segment is reassuring and removes the need for further imaging. The patient is a surgical candidate. ## Why Other Options Fail | Option | Why Incorrect | |--------|---------------| | B-scan ultrasonography | Indicated only if posterior segment cannot be adequately visualized (dense cataract, media opacity). Here, dilated examination was possible and normal — B-scan is unnecessary and delays management. | | Topical NSAIDs | No evidence supports NSAIDs in halting cataract progression. They do not address the underlying lens opacity. Surgery is the definitive treatment for symptomatic cataracts. | | Rheumatology referral | While PSC can be associated with systemic disease (steroids, myotonic dystrophy, hypoparathyroidism), this patient has no clinical features suggesting autoimmune disease. Routine screening without clinical indication is not standard practice. | ## Management Decision Tree ```mermaid flowchart TD A[Posterior subcapsular cataract]:::outcome --> B{Functional impairment?}:::decision B -->|No| C[Counsel on natural history, review annually]:::action B -->|Yes| D{Posterior segment pathology?}:::decision D -->|Yes| E[Investigate/manage posterior disease first]:::action D -->|No| F[Cataract surgery is indicated]:::outcome F --> G[Obtain informed consent]:::action G --> H[Schedule phacoemulsification]:::action C --> I{Progression or worsening symptoms?}:::decision I -->|Yes| F I -->|No| C ``` **Key Point:** VA 6/18 with symptomatic glare meets the threshold for surgical consideration. The next step is informed discussion with the patient, not further testing.