A 14‑year‑old middle school student, Xiao Xu, had one milk tea every day. He went to the hospital due to dry mouth and polydipsia, and was diagnosed with diabetes.
Diabetes affects far more than blood sugar. Dr. Gui Junmin, vice president of Chongqing Nanping Aier Eye Hospital, stated that long‑term high‑sugar diet not only impacts glucose but also endangers eye health.
Refined sugars in milk tea (sucrose, fructose) cause blood glucose to spike like a roller coaster. Chronic hyperglycemia "corrodes" the tiny vessels in the retina – endothelial cells are damaged, vessel walls become fragile and leaky, leading to edema and hemorrhage.
More dangerously, the body grows fragile new vessels to compensate, but these are like faulty pipes. Once ruptured, they cause vitreous hemorrhage and even tractional retinal detachment, posing a high risk of blindness.
This series of ocular damage is the process of diabetic retinopathy (DR).
The scary part about DR lies in its "silence" and "irreversibility".
1. Almost no symptoms in early stage
Many diabetics have silent retinal bleeding for years without noticing any vision change. By the time vision drops, objects warp, or floaters appear, it is often already moderate to advanced.
2. Damage cannot be reversed
Once retinal neurons die, they cannot regenerate. Even after surgery to remove blood, only part of the vision can be restored or maintained – never fully back to pre‑disease state.
3. High blindness rate
Data shows 1 in 3 diabetics will develop DR. The longer the diabetes duration, the higher the risk. Over 60%‑70% of patients with diabetes for more than 10 years will have DR. The blindness risk for diabetics is 25 times that of healthy people.
Therefore, Dr. Gui recommends that once diabetes is diagnosed, patients should have a fundus exam at a professional eye hospital immediately, and then at least once a year thereafter. Early detection and treatment prevent blindness. If DR is already present, follow the doctor's advice for regular follow‑up.
DR is not a death sentence: early detection preserves vision.
Strict glucose control, regular exams, combined with medication and laser therapy can halt progression. Laser acts like "welding leaks" – sealing leaking vessels and preventing neovascularization.
For macular edema (the culprit of distorted vision), intravitreal injections reduce swelling and preserve central vision. In severe DR, vitrectomy is needed to clear blood and remove proliferative membranes, "repairing" or "reattaching" the retina.
Notably, intravitreal injection is a "protracted battle". Some patients stop after 1‑2 injections when symptoms ease, or give up if no immediate improvement – both are wrong. The drug metabolizes over time; only by following the prescribed schedule can treatment gains be consolidated. Diabetic patients should be prepared for long‑term care and choose a professional eye hospital for standardized treatment.
Daily life: do these things well
Dr. Gui suggests, besides regular checks and standard treatment, the following daily habits:
Control basic indicators
Through diet (reduce high‑sugar, high‑fat foods), exercise, and medication, stabilize blood glucose, blood pressure, and lipids.
2. Avoid eye strain
Especially for those with DR, avoid prolonged screen time and excessive eye fatigue.
3. Moderate exercise
Appropriate exercise helps control glucose and blood pressure, but choose low‑intensity activities like walking or jogging; avoid vigorous sports like basketball or jumping rope.
4. Quit smoking and alcohol
Smoking and drinking may worsen DR and hinder recovery.
This article uses the case of a 14‑year‑old with daily milk tea and diabetes to highlight the strong link between high‑sugar diet and diabetic retinopathy (DR). The core mechanism: refined sugar causes sustained hyperglycemia, damaging retinal microvascular endothelium, leading to leakage, edema, hemorrhage, and compensatory neovascularization. These new vessels are fragile and prone to rupture, causing vitreous hemorrhage and tractional detachment – a high risk of blindness.
DR's "silent" nature makes it a stealthy threat – early asymptomatic, easily overlooked. Once vision drops, it is often late stage. Its irreversibility underscores the value of prevention and early screening. Data shows 60%‑70% of those with diabetes >10 years develop DR, and blindness risk is 25× higher – a stark warning.
Treatment combines glucose control, regular exams, laser, injections, and surgery. Notably, intravitreal injections require persistence; stopping early undermines efficacy. Lifestyle modification (low‑sugar diet, exercise, quitting smoking/alcohol) is the foundation. Overall, the piece is both educational and alarming, especially for younger generations.
Problem: High‑sugar diet (e.g., milk tea) leads to diabetes and DR, threatening vision.
Solution:
Execution: Endocrinologist and ophthalmologist collaboration; establish "diabetic eye disease management files"; self‑monitor glucose; regular eye follow‑up; community/school health education on diet.
Validation: ① Fundus exam frequency (≥1/year); ② DR treatment compliance (laser/injection completion); ③ glucose control (HbA1c<7%); ④ vision preservation/improvement rate; ⑤ public awareness survey on DR.