Medically reviewed content · Last reviewed: 15 Jan 2026
Overview
Diabetes can damage the small blood vessels of the retina — often with no symptoms in the early stages. Diabetic retinopathy is a leading cause of preventable vision loss, which is why regular dilated eye examinations matter even when your vision feels normal. Screening frequency depends on the duration and control of your diabetes and any retinal findings.
Symptoms & Warning Signs
- Often no early symptoms
- Fluctuating or blurred vision
- Dark spots or floaters
- Difficulty with night vision
- Sudden vision loss in advanced stages
Possible Causes
Persistently elevated blood sugar damages retinal capillaries, causing leakage, swelling (macular edema) and, in advanced stages, abnormal new vessel growth.
When to Consult an Eye Specialist
People with diabetes should have a dilated retinal examination at diagnosis (type 2) or within five years (type 1) and at intervals advised by the specialist. Any sudden visual change needs urgent review.
Diagnostic Process
- Dilated fundus examination
- OCT to detect macular swelling
- Fundus photography for documentation and comparison
- Fluorescein angiography in selected cases
Management & Treatment Approaches
- Blood sugar, pressure and lipid control with your physician
- Intravitreal anti-VEGF or steroid injections for macular edema
- Laser photocoagulation for proliferative disease
- Vitrectomy for advanced complications
What to Expect
Screening visits are quick and painless. If treatment is needed, your doctor will explain the likely number of sittings and the role of your diabetes control in the outcome.
Risks & Limitations
Injections and laser are generally well tolerated but carry small risks of infection, pressure rise or inflammation. Vision already lost to advanced disease may not fully recover despite treatment.
Recovery & Follow-up
Most treatments are day-care with rapid return to routine. Lifelong periodic monitoring is usually required, even after successful treatment.
Frequently Asked Questions
Medical disclaimer: This page is general educational information, not a diagnosis or a guarantee of any outcome. Treatment decisions are made only after an in-person evaluation by a qualified eye specialist.