Medicine With regard to sickle cell disease – A 25% of the black population have sickle cell disease B The most severe form of sickle cell retinopathy is associated with SS disease C Optic disc is the first site of neovascularization in patient with severe retinal ischamia D None of the above 💡 Explanation With regard to sickle cell disease - ✓ Correct Answer: D. None of the above