A 45-year-old woman on long-term systemic corticosteroids for rheumatoid arthritis presents with blurred vision. Slit-lamp examination reveals anterior subcapsular lens opacities. Which of the following is NOT a recognized association or feature of steroid-induced cataract?

Explanation

## Steroid-Induced Cataract: Clinical Characteristics **Key Point:** Steroid-induced cataracts characteristically develop in the **posterior subcapsular (PSC) region** — this is the hallmark and most common site of involvement. Anterior subcapsular opacities are NOT the classic location for steroid-induced cataracts. ### Steroid-Induced Cataract: Features and Associations | Feature | True/False | Clinical Significance | |---------|-----------|----------------------| | Anterior subcapsular location as primary site | **False** | Steroid-induced cataracts classically affect the **posterior** subcapsular region, not the anterior | | Dose-dependent relationship | **True** | Risk increases with higher cumulative doses and longer duration of therapy (Black et al.; Kanski's Clinical Ophthalmology) | | Reversibility in early stages | **True** | Early PSC opacities may partially regress if steroids are discontinued promptly | | Posterior subcapsular as primary site | **True** | PSC is the pathognomonic location for steroid-induced cataract | **High-Yield (Kanski's Clinical Ophthalmology / Parsons' Diseases of the Eye):** Steroid-induced cataracts are **posterior subcapsular cataracts (PSC)**. This is true for both systemic and topical corticosteroid use. The PSC location causes disproportionate visual symptoms (glare, difficulty reading) because the opacity lies at the nodal point of the eye. ### Steroid-Induced vs. Age-Related Posterior Subcapsular Cataract | Feature | Steroid-Induced PSC | Age-Related PSC | |---------|---------------------|----------------| | Location | **Posterior subcapsular** | Posterior subcapsular | | Onset | Can be rapid (months) | Slow (years) | | Reversibility | Possible if caught early | Irreversible | | Risk factors | Systemic/topical corticosteroids | Age, UV exposure, diabetes | | Visual symptoms | Glare, difficulty reading | Glare, difficulty reading | **Clinical Pearl:** The stem describes "anterior subcapsular opacities" in a steroid-exposed patient — this is the **atypical/incorrect** association. Option A (anterior subcapsular location) is therefore the feature that is **NOT** a recognized association of steroid-induced cataract, making it the correct answer to this "NOT" question. **Reference:** Parsons' Diseases of the Eye (23rd ed.); Kanski's Clinical Ophthalmology (9th ed.) — both confirm PSC as the classic steroid-induced cataract location. **Mnemonic:** **S**teroids → **S**ubcapsular **P**osterior Cataract (**PSC**). Anterior subcapsular cataracts are associated with blunt trauma and atopic disease, not steroids.