The National Programme for Control of Blindness (NPCB) in India has set a target cataract surgical rate (CSR). A district ophthalmologist wants to assess his district's cataract backlog. What is the FORMULA for calculating the Cataract Surgical Rate (CSR)?

• A CSR = (Number of cataract operations per year / Total population) × 100
• B CSR = (Number of cataract operations per year / Total population) × 1,000,000 ✓
• C CSR = (Blind persons operated / Total blind persons) × 100
• D CSR = (Cataract operations / Number of ophthalmologists) per year

Explanation

Cataract Surgical Rate (CSR) is expressed as the number of cataract operations performed per million population per year. CSR = (Number of cataract operations per year ÷ Total population) × 1,000,000. India needs a CSR of at least 6,000-7,000 to eliminate the cataract backlog. India's current CSR exceeds 6,000, making it one of the highest in the world, though geographic distribution remains uneven.

Reference: Khurana Comprehensive Ophthalmology, 7th ed.

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