In the NOSPECS classification of thyroid eye disease, which class specifically refers to corneal exposure and involvement?
- A Class 2 (S — Soft tissue involvement)
- B Class 3 (P — Proptosis)
- C Class 5 (C — Corneal involvement) ✓
- D Class 4 (E — Extraocular muscle involvement)
Correct answer: C. Class 5 (C — Corneal involvement)
Explanation
The NOSPECS classification (No signs/symptoms, Only signs, Soft tissue, Proptosis, Extraocular muscle, Corneal, Sight loss) assigns Class 5 to corneal involvement resulting from lagophthalmos and exposure. Class 6 (S — Sight loss) involves optic nerve compression. The most clinically serious complications are compressive optic neuropathy (Class 6) and corneal exposure (Class 5), both of which require urgent intervention.
Reference: Khurana Comprehensive Ophthalmology, 7th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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