Proliferative sickle cell retinopathy is characterized by what?

Proliferative sickle cell retinopathy is characterized by what?

• A. Narrowing of retinal vessels unrelated to oxygen levels
• B. Bleeding in the retina is the primary issue
• C. Retinopathy has no effect on vision
• D. Blood vessels form around the eyes to compensate for lack of oxygen there

Answer: (D)

The key idea is that retinal ischemia from sickled cells triggers new blood vessel growth in the eye. When the retina doesn’t get enough oxygen, it signals for neovascularization to restore oxygen delivery. In proliferative sickle cell retinopathy, these new vessels form on the retina and around the optic nerve. They’re fragile and prone to leakage, which can lead to vitreous hemorrhage and, later, scar tissue and tractional retinal detachment, causing vision problems. So describing blood vessels forming around the eye areas to compensate for oxygen lack captures this neovascular response driven by hypoxia. Other statements don’t reflect this process as accurately: the disease isn’t defined primarily by vessel narrowing unrelated to oxygen, nor by bleeding as the primary issue, and it does affect vision in the proliferative stage.

The key idea is that retinal ischemia from sickled cells triggers new blood vessel growth in the eye. When the retina doesn’t get enough oxygen, it signals for neovascularization to restore oxygen delivery. In proliferative sickle cell retinopathy, these new vessels form on the retina and around the optic nerve. They’re fragile and prone to leakage, which can lead to vitreous hemorrhage and, later, scar tissue and tractional retinal detachment, causing vision problems. So describing blood vessels forming around the eye areas to compensate for oxygen lack captures this neovascular response driven by hypoxia. Other statements don’t reflect this process as accurately: the disease isn’t defined primarily by vessel narrowing unrelated to oxygen, nor by bleeding as the primary issue, and it does affect vision in the proliferative stage.