Primary pigmentary degeneration of retina, also known as retinitis pigmentosa (RP), is a group of inherited retinal degenerative diseases with progressive photoreceptor and pigment epithelial loss as a common manifestation. Blanket-retinal degeneration (tapetoretinal degeneration), with night blindness, progressive visual field damage, fundus pigmentation and electroretinogram abnormalities or absence of waves as its main clinical features, is also a common blinding eye disease worldwide. Retinitis pigmentosa is mostly a single eye disease, but some patients may have other systemic abnormalities in the form of syndromes: 1, retinitis pigmentosa is a global problem, and there is no good way to treat this disease worldwide; 2, do not trust online inquiries, and do not seek medical advice in an emergency; 3, do not do any eye surgery, laser, etc. (cataract patients are another story); 4, lutein does not have a good effect on patients, and smoking has no effect on patients. Too good effect, and smokers and people who often smoke second-hand smoke to eat lutein will make the chances of getting lung cancer become larger.