Eye Health and Diabetes

Understanding the Relationship Between Diabetes and Eye Health

To maintain healthy vision, light must pass through the front of the eye to the retina, where it is focused by the lens. The retina serves as the light-sensitive layer at the back of the eye, converting light into electrical signals that the optic nerve transmits to the brain. A delicate network of blood vessels provides the necessary blood supply to the retina. However, when these vessels become blocked, leaky, or grow abnormally due to diabetes, the retina suffers damage, a condition known as retinopathy.

Risks to Your Eyes and Preventative Measures

Persistent high levels of glucose can lead to significant eye damage. To mitigate the risk of developing eye problems, it is crucial to keep blood glucose, blood pressure, and blood fats within a specific target range agreed upon with your healthcare team. Achieving these targets through a healthy lifestyle and prescribed diabetes treatment is essential. Additionally, smoking significantly contributes to eye damage; therefore, cessation is a critical step in protecting your vision.

Primary Types of Retinopathy

Retinopathy progresses through different stages, each affecting vision in various ways. Understanding these types is vital for early intervention.

1. Background Retinopathy

This represents the earliest visible changes to the retina. While background retinopathy does not immediately affect eyesight, it requires diligent monitoring. During this stage, the capillaries may bulge (microaneurysms), leak blood (haemorrhages), or leak fluid (exudates).

2. Maculopathy

Maculopathy occurs when background retinopathy affects the macula, the central area of the retina responsible for detailed vision. If fluid leaks from enlarged vessels, it causes swelling (oedema), leading to blurred vision. This condition makes it difficult to read or see fine details, often described as looking through a layer of fluid.

3. Proliferative Retinopathy

As the condition advances, large areas of the retina may be deprived of blood supply. This triggers the growth of new blood vessels, which are fragile and prone to bleeding. The resulting scar tissue can pull on the retina, leading to retinal detachment and potential blindness. This stage typically requires urgent laser therapy.

Treatment Options for Diabetic Retinopathy

Modern medicine offers several effective treatments to manage and stabilize vision loss caused by diabetes.

Laser Treatment (Photocoagulation)

Photocoagulation is a revolutionary laser treatment that uses bright light beams to create tiny burns. These burns stop leaks and prevent the growth of abnormal new vessels by improving oxygen and nutrient flow to the retina.

The Procedure Details:

• Preparation: Local anaesthetic and pupil-dilating drops are applied.
• Application: A special contact lens holds the eyelids open while the laser focuses on damaged areas.
• Action: Small laser bursts seal leaky vessels and destroy abnormal growth.
• Setting: Performed as an outpatient procedure by an ophthalmologist.

Anti-VEGF (Intra-ocular) Injections

Anti-VEGF injections are specifically used to treat maculopathy. Vascular endothelial growth factor (VEGF) is a protein that stimulates abnormal vessel growth when oxygen levels are low. Anti-VEGF treatments bind to this protein, inhibiting its effects and reducing fluid leakage into the macula to stabilize vision.

Vitrectomy Surgery

In advanced cases where haemorrhages do not clear or the retina detaches, a vitrectomy may be necessary. This major surgical procedure involves removing the vitreous (the gel-like substance in the eye) and replacing it with a clear substitute. This operation is usually performed under general anaesthetic and requires a hospital stay.

Post-Treatment Recovery and Advice

After undergoing eye treatments, patients may experience temporary blurred vision or sensitivity to light. It is highly recommended to follow these safety steps:

Vision typically returns to normal within a few hours after laser treatment. For the best outcomes, maintain regular screenings and consult your eye specialist, such as Op. Dr. Ahmet UMAY, to determine the most suitable treatment plan for your specific condition.