Social & Preventive Medicine Serum retinol below which level is considered to be an indicator for xerophthalmia? A 1 mcg/ dl B 5 mcg/ dl C 10 mcg/ dl D None of the above 💡 Explanation Serum retinol below which level is considered to be an indicator for xerophthalmia? ✓ Correct Answer: C. 10 mcg/ dl