Which type of cataract is characteristically associated with Myotonic dystrophy (Steinert disease)?
- A Nuclear sclerosis
- B Anterior polar cataract
- C Christmas tree (polychromatic) cataract with posterior subcapsular involvement ✓
- D Oil droplet (lamellar) cataract
Correct answer: C. Christmas tree (polychromatic) cataract with posterior subcapsular involvement
Explanation
Myotonic dystrophy produces a distinctive 'Christmas tree' or polychromatic cataract—iridescent needle-like opacities of varied colors in the cortex and posterior subcapsular lens region. This is pathognomonic and may precede the muscle features of the disease. The 'oil droplet' or lamellar cataract is classically associated with galactosaemia and hypocalcaemia, while nuclear sclerosis is age-related.
Reference: Khurana Comprehensive Ophthalmology, 7th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.