The coverage of cataract surgical services is measured by Cataract Surgical Coverage (CSC). CSC at the person level is defined as:
- A Number of cataract surgeries performed per million population per year
- B Proportion of people with bilateral cataract blindness who have received bilateral surgery
- C Proportion of people needing cataract surgery who have already received surgery in at least one eye ✓
- D The postoperative visual acuity achieved in 80% of operated eyes
Correct answer: C. Proportion of people needing cataract surgery who have already received surgery in at least one eye
Explanation
CSC at the person level = operated persons / (operated persons + persons needing surgery) × 100. It measures what proportion of people who needed surgery (including those already operated) have received it in at least one eye. Eye-level CSC measures coverage per eye. CSC is distinct from the Cataract Surgical Rate (CSR), which counts surgeries per million population per year. India's CSR exceeds 6500 per million but person-level CSC remains around 60–70% in rural areas due to barriers to access.
Reference: Khurana Comprehensive Ophthalmology, 7th ed.
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Written and medically reviewed by the StethoPrep medical team.