Down syndrome

1) Disease Description (Causes and Symptoms)

• Definition and causes
  • Diabetic retinopathy is a complication caused by damage to the retinal microvasculature due to diabetes. Pathophysiologically, hyperglycemia causes vascular endothelial damage, increased vascular permeability, microvascular occlusion (ischemia), and neovascularization (proliferation of new blood vessels).
  • The risk of occurrence is closely related to the duration of diabetes; in general, the longer a person has had diabetes, the higher the incidence (e.g., approximately 60–70% after around 15 years of disease and approximately 90% after more than 30 years).
• Main symptoms
  • It is often asymptomatic in the early stages. Main symptoms include decreased vision, metamorphopsia, in which objects appear distorted due to central visual field (macular) impairment, blurred vision, floaters (floating spots or specks), photopsia, and partial visual field defects.
  • Complications may include macular edema (a major cause of decreased central vision), vitreous hemorrhage, tractional retinal detachment, and complications caused by neovascularization (neovascular bleeding and neovascular glaucoma).
• Classification (brief)
  • Nonproliferative (early stage): microvascular damage, hemorrhage, mild ischemia, vascular leakage, etc.
  • Proliferative (advanced stage): neovascularization develops in ischemic areas, increasing the risk of hemorrhage and tractional retinal detachment

2) Treatment Methods and Precautions (Including Medications, Procedures, Surgery, and Lifestyle Management)

• Systemic management (the foundation of treatment)
  • Blood glucose control: suppresses the occurrence and progression of the disease over the long term. The HbA1c target differs for each patient and should be determined with the attending physician.
  • Blood pressure and lipid control: actively treat coexisting hypertension and dyslipidemia to suppress worsening of retinopathy. Smoking cessation is recommended.
  • Because retinopathy may worsen during pregnancy, frequent examinations are necessary.
• Local and ophthalmic treatment (standard treatment)
  • Macular edema (DME)
    • First-line: intravitreal anti-VEGF injections (e.g., ranibizumab, aflibercept, bevacizumab, including uninsured and off-label use) — effective for improving vision and reducing edema.
    • Steroids (intravitreal or implants): considered when there is no response to anti-VEGF or in special circumstances (adverse effects: increased intraocular pressure and progression of cataracts).
    • Laser (focal/grid photocoagulation): effective for certain cases of DME; although anti-VEGF is currently preferred, it may be used in combination or selected depending on the lesion pattern.
  • Proliferative diabetic retinopathy (PDR)
    • Panretinal photocoagulation (PRP): suppresses neovascularization and reduces the risk of blindness.
    • Anti-VEGF injections: may be used before or after PRP or as adjunctive treatment.
  • Surgical treatment
    • Vitrectomy and, when necessary, retinal surgery are performed for vitreous hemorrhage, tractional retinal detachment, or cases that cannot be resolved with photocoagulation.
• Diagnostic tests (tests for treatment decisions)
  • Dilated fundus examination (including slit-lamp-assisted examination), fluorescein angiography (FA), optical coherence tomography (OCT), ultrasonography (B-scan), etc.
• Precautions and adverse effects
  • Rapid improvement in blood glucose may temporarily worsen retinopathy; a plan should be established with a physician.
  • Adverse effects of laser treatment: visual field defects, decreased night vision, macular damage, etc.
  • Adverse effects of anti-VEGF injections: injection-related infection (endophthalmitis), temporary increase in intraocular pressure, etc.
  • Steroid use may cause increased intraocular pressure and progression of cataracts.
• Prognosis
  • Early detection and treatment can greatly reduce the risk of blindness. The presence or absence of macular damage has a major impact on the visual prognosis.

3) Checkpoints Before an Outpatient Visit (Including Items to Bring, Preparation Before the Visit, and Example Questions)

• Items to bring/materials that can be submitted
  • List of currently used medications (including oral medications, insulin, and anticoagulants)
  • Recent blood glucose/HbA1c test results and blood pressure/lipid test results (if possible, from the past 3–6 months)
  • Previous ophthalmic examination records (fundus photographs, OCT, fluorescein angiography results, etc.)
  • Record of changes in symptoms (when they began and what symptoms are present: blurring, floaters, photopsia, metamorphopsia, etc.)
  • Pregnancy status (for women) and smoking status
• Symptoms to check before the visit (to be observed by the patient)
  • Immediate emergency medical care is necessary if sudden vision loss, numerous floaters (an increase in floating objects), flashes of light (photopsia), or partial loss of the visual field occurs.
• Materials or notes to show the doctor during the outpatient visit
  • When symptoms began and how they have progressed, recent blood glucose control status, and history of previous ophthalmic treatment (laser treatment, injections, surgery, etc.)

4) Examples of General Questions to Ask the Doctor

• "What stage is my retinopathy at? Is there an abnormality (edema) in the macula?"
• "Do I currently need a procedure (laser treatment or anti-VEGF)? What are the advantages and disadvantages of each treatment?"
• "What is my prognosis (the likelihood of preserving vision)? What should I be especially careful about in daily life?"
• "What adverse effects or complications may occur after treatment, and how should I prepare for them?"

5) Examples of Disease-Specific Questions

• "My recent HbA1c is [value]. Can progression of diabetic retinopathy be prevented with this level of control? What should my target HbA1c be?"
• "My macular thickness on OCT was [value] μm. Do I need an anti-VEGF injection, or would laser treatment be more appropriate?"

(If necessary, if you provide your test results or recent blood glucose and medication information, we can organize more specific questions for consultation and a preparation checklist for your outpatient visit.)