In my 15 years of practice at The Eye Clinic in Kankurgachi, one pattern stands out above all others: diabetic patients who come to me far too late. Not because they weren't concerned about their health — they were managing their blood sugar, seeing their diabetologist, taking their medications. They simply didn't know that diabetes was silently damaging their eyes.
This article is my attempt to change that, one patient at a time.
Diabetic retinopathy causes no pain and no early vision symptoms. By the time you notice blurring or vision changes, significant — and often irreversible — damage has already occurred to the retina.
What Is Diabetic Retinopathy?
The retina is a thin layer of light-sensitive tissue at the back of your eye — essentially, the "film" of your camera. It contains thousands of tiny blood vessels that nourish its cells. When blood sugar levels are persistently elevated, these vessels are damaged: they leak, swell, grow abnormally, and ultimately fail.
This damage to the retinal blood vessels is called diabetic retinopathy. Over time, it can lead to:
- Macular oedema — fluid leaking into the central retina, blurring the reading and detail vision you need most
- Proliferative retinopathy — abnormal new blood vessels that bleed into the eye, causing sudden, dramatic vision loss
- Retinal detachment — scar tissue pulling the retina away from the eye wall, a surgical emergency
- Neovascular glaucoma — raised eye pressure from abnormal vessels growing over the drainage angle
"Diabetic retinopathy does not announce itself. In its early stages, you will see perfectly — and your retina will be slowly, silently deteriorating."
— Dr. Swati Agarwal, Gold Medalist Eye SurgeonWho Is at Risk — and How Much?
Every diabetic patient is at risk. The two strongest predictors of retinopathy are duration of diabetes and how well blood sugar is controlled. The numbers are sobering:
- After 10 years of diabetes, approximately 40–50% of patients have some degree of retinopathy
- After 20 years, nearly all Type 1 and more than 60% of Type 2 diabetic patients show retinal changes
- India has the second largest diabetic population in the world — and retinopathy rates in urban India mirror global figures
Additional risk factors include high blood pressure, high cholesterol, kidney disease, pregnancy, and smoking — all of which accelerate retinal damage in diabetic eyes.
With regular screening and timely treatment, 90% of severe vision loss from diabetic retinopathy is preventable. The key word is "timely." The treatment window matters enormously.
When Should You Get Screened?
The answer depends on your type of diabetes and how long you've had it. Here is the screening schedule I follow at The Eye Clinic, consistent with international ophthalmology guidelines:
| Patient Type | First Exam | Frequency |
|---|---|---|
| Type 1 Diabetes | 5 years after diagnosis | Annually thereafter |
| Type 2 Diabetes | At diagnosis (immediately) | Annually if normal |
| Diabetes in Pregnancy | First trimester | Every trimester |
| Existing retinopathy | Already diagnosed | Every 3–6 months |
| Any sudden vision change | Same day — do not wait | As directed by doctor |
At our Saturday Diabetic Eye Clinic, we perform a dilated fundus examination — the gold standard for retina assessment — along with fundus photography that creates a permanent record of your retina's condition over time. This allows us to detect even subtle year-on-year changes that might otherwise go unnoticed.
Symptoms to Never Ignore
While early retinopathy has no symptoms, more advanced disease can produce warning signs. See an eye doctor the same day if you notice:
- Sudden blurring of central vision (especially reading)
- Floating spots, cobwebs, or streaks in your vision
- A dark curtain or shadow across part of your visual field
- Fluctuating vision — better in the morning, worse at night, or varying day to day
- Colours appearing washed out or faded
Any of these, in a known diabetic, constitutes an ophthalmic emergency until proven otherwise.
What Treatment Looks Like
The good news is that diabetic retinopathy, when caught early, responds well to treatment. At The Eye Clinic, we offer:
- Laser photocoagulation — seals leaking blood vessels and stops the growth of abnormal new vessels
- Anti-VEGF injections — medication injected into the eye that reduces abnormal vessel growth and macular oedema, often with dramatic results
- Vitrectomy — surgical removal of the jelly inside the eye for advanced cases with bleeding or retinal detachment (referred to a vitreoretinal specialist)
Treatment does not restore lost vision — it preserves the vision that remains. This is why the word "early" appears in every guideline on diabetic eye care.
Our Saturday Diabetic Eye Clinic
Recognising that diabetic patients in Kolkata often see their physician on weekdays, we have dedicated every Saturday morning at The Eye Clinic specifically to diabetic eye care. In a single visit, you receive:
- Dilated fundus examination by Dr. Swati personally
- Fundus photography with comparison to previous visits
- Intraocular pressure measurement
- A written clinical summary you can share with your diabetologist
- A personalised next-appointment plan
Appointments run from 10am to 1pm and must be booked in advance. WhatsApp +91 91477 13455 or call us to reserve your slot.
Every Saturday · 10am – 1pm · 2A Motilal Basak Lane, Kankurgachi, Kolkata.
Call +91 91477 14355 or WhatsApp +91 91477 13455 to book.
The Bottom Line
Diabetes is a systemic disease that affects your kidneys, heart, nerves — and your eyes. Of all diabetic complications, retinopathy is one of the most preventable, and yet it remains devastatingly common because patients and even their physicians don't prioritise annual retina screening.
If you are diabetic and have never had a dilated eye exam, please make that appointment today — not next month, not after the next HbA1c result. Today.
If you have a family member or friend with diabetes, please share this article with them. It may be the most important thing you do for their long-term quality of life.