Every week at our Auburn clinic, we see patients with Type 1 or Type 2 diabetes who haven't had their eyes examined in years. Often they feel fine, no blurry vision, no discomfort. That's exactly the problem. Diabetic eye disease can progress silently for years before causing any symptoms at all, and by the time vision changes become noticeable, significant and irreversible damage may already have occurred.
Diabetic retinopathy is one of the leading causes of preventable blindness in Australia. The word “preventable” is important. With regular monitoring and timely intervention, most people with diabetes can protect their sight for life.
How Diabetes Affects Your Eyes
Both Type 1 and Type 2 diabetes can damage the eyes through the same mechanism: persistently elevated blood sugar damages the tiny blood vessels (capillaries) that supply the retina, the light-sensitive tissue lining the back of the eye.
This damage progresses through four recognised stages:
- Mild non-proliferative retinopathy: Small areas of balloon-like swelling in the retinal vessels (microaneurysms). No symptoms at this stage.
- Moderate non-proliferative retinopathy: Some blood vessels that nourish the retina become blocked. Vision may still be unaffected.
- Severe non-proliferative retinopathy: More vessels are blocked, depriving large areas of the retina of blood supply. The retina signals the body to grow new vessels.
- Proliferative retinopathy: Fragile new blood vessels grow on the surface of the retina. These can bleed into the eye, cause retinal detachment, and lead to severe vision loss or blindness.
Diabetic macular oedema, swelling of the macula (the central, high-resolution part of the retina), can occur at any stage and is a major cause of vision loss in people with diabetes.
The Problem: It's Silent Until It's Serious
This is the most important thing to understand about diabetic eye disease: there are no symptoms in the early stages. Patients with mild to moderate retinopathy typically have completely normal vision. The only way to detect early diabetic changes is through a dilated eye examination or an OCT retinal scan, neither of which you can do at home or at a GP appointment.
By the time a person notices blurring, floaters, or dark patches in their vision, the disease is usually already at an advanced stage. This is why regular, proactive eye examinations are not optional for anyone with diabetes, they are essential.
“I see patients who have had diabetes for ten years and never had an eye test. Not because they were negligent, but because no one told them it was necessary. The eye test is not just about seeing clearly; for a diabetic patient, it can be genuinely sight-saving.”
, Dr Zobaida Tahiri, Therapeutically Endorsed Optometrist, Auburn NSW
How Often Should Diabetics Have Eye Tests?
The frequency depends on your diabetes type, how long you've had it, and whether any retinopathy has already been detected:
- Type 1 diabetes: First eye examination within 5 years of diagnosis (or earlier if blood sugar control has been poor), then annually.
- Type 2 diabetes: Eye examination at the time of diagnosis (since type 2 is often present for years before being detected), then annually.
- If retinopathy is already present: More frequent examinations, every 3 to 6 months, are typically recommended depending on severity.
- During pregnancy with pre-existing diabetes: Eye examinations before conception and in each trimester, as pregnancy can accelerate diabetic retinopathy progression.
What Does a Diabetic Eye Exam Actually Check?
A diabetic eye examination at Prime Optometrists Auburn goes considerably further than a standard vision check. It includes:
- Dilated fundus examination: Eye drops temporarily enlarge the pupil, allowing a detailed view of the retina, optic nerve head, and blood vessels. This remains the clinical gold standard for retinopathy detection.
- OCT retinal imaging: Optical Coherence Tomography produces a cross-sectional scan of the retinal layers with micron-level resolution. It can detect macular oedema, subretinal fluid, and structural retinal changes long before they affect vision. Read more about our diagnostic technology.
- Visual acuity testing: A baseline measure of your best-corrected vision at each visit, to detect any changes over time.
- Intraocular pressure (IOP) measurement: People with diabetes have a higher risk of developing glaucoma. IOP is measured at each exam.
What's Covered by Medicare?
Medicare provides specific provisions for diabetic patients that many people are unaware of. Under item number 10916, optometrists can bill an additional assessment item for diabetic retinopathy examination, beyond the standard consultation item. This is intended to reflect the additional time, equipment, and clinical complexity involved in a proper diabetic eye assessment.
Medicare also allows diabetic patients to have a fully covered (bulk-billed) comprehensive eye examination every 12 months regardless of age, more frequently than the standard two-yearly interval for healthy adults. At Prime Optometrists Auburn, we bulk bill eligible patients with a valid Medicare card, meaning there is no out-of-pocket cost for most diabetic patients.
Book your diabetic eye examination online, our team will confirm your Medicare eligibility when you call or book.
Risk Factors That Speed Up Progression
Not everyone with diabetes develops significant retinopathy, but certain factors substantially increase the risk and rate of progression:
- Poor blood sugar control (elevated HbA1c): The single most important modifiable risk factor. Even a 1% reduction in HbA1c reduces the risk of retinopathy progression by approximately 35%.
- High blood pressure: Hypertension independently damages retinal blood vessels and compounds diabetic damage.
- High cholesterol: Elevated lipids are associated with harder retinal exudates and macular damage.
- Duration of diabetes: The longer you have had diabetes, the higher the cumulative risk, but this is all the more reason for diligent annual monitoring.
- Smoking: Smoking worsens both blood sugar control and retinal blood vessel health.
- Kidney disease (nephropathy): Diabetic nephropathy and diabetic retinopathy share the same small vessel disease mechanism and frequently co-occur.
What Can You Do to Protect Your Sight?
The good news is that the factors that protect your eyes are the same ones that protect your overall health with diabetes:
- Keep HbA1c as close to your target range as possible
- Control blood pressure, aim for less than 130/80 mmHg
- Manage cholesterol with diet, exercise, and medication if needed
- Do not smoke, or seek support to quit
- Have your eyes examined annually without fail
As a therapeutically endorsed optometrist, Dr Zobaida Tahiri can co-manage diabetic eye conditions, liaise directly with your GP or endocrinologist, and refer you promptly to an ophthalmologist if treatment such as laser or intravitreal injections becomes necessary.
Book Your Diabetic Eye Test in Auburn NSW
Prime Optometrists is located in Auburn NSW 2144, serving patients from Auburn, Lidcombe, Granville, Parramatta, Berala, Regents Park, and across Western Sydney. We have OCT retinal imaging technology on-site and offer bulk-billed assessments for eligible Medicare patients.
If you have diabetes and haven't had your eyes checked in the past 12 months, or if you've never had a diabetic eye examination, book an appointment today. Your eyesight is worth protecting, and early detection makes all the difference.