Effect of Diabetes on the Retina when to worry

Home

Our Blog

May 15, 2026

Last updated: 15/5/2026

The effect of diabetes on the retina is one of the complications that requires regular follow-up in diabetic patients, especially because changes may begin gradually without clear symptoms at first. When blood sugar levels remain high for long periods, the tiny blood vessels that nourish the retina may be affected. The retina is the part of the eye responsible for receiving light and helping form a clear image.

This does not mean that every diabetic patient will develop a retinal problem. However, early examination helps detect any changes at the right time, before they affect vision quality. According to the Saudi Ministry of Health, controlling blood sugar levels and maintaining regular eye follow-up are among the most important steps that reduce the risk of diabetes-related retinal complications.

Do you have a question about the effect of diabetes on the retina? Contact us via WhatsApp, and the Magrabi team will help you understand the most suitable medical step.

What is the effect of diabetes on the retina?

The effect of diabetes on the eye appears when blood sugar levels remain high or unstable for long periods, which may gradually affect the tiny blood vessels that nourish the retina. The retina is the light-sensitive layer at the back of the eye, and it plays an essential role in clear vision and transmitting images to the brain.

Over time, these blood vessels may become weaker and may begin to leak fluid or blood inside the retina. In some cases, swelling may occur in the macula, which is the area responsible for seeing fine details such as reading and recognizing faces. This is sometimes known as retinal leakage or macular edema.

In more advanced stages, due to the increasing effect of diabetes on the retina, the body may try to compensate for poor blood circulation in the retina by forming new blood vessels. However, these vessels are often weak and easy to bleed. At this stage, retinal bleeding in diabetic patients may occur, or vision may become more clearly affected, especially if medical follow-up is delayed.

This condition is known as diabetic retinopathy. It is one of the complications that can be managed more effectively when detected early. Doctors at Magrabi explain that regular fundus examination is not only useful for treating the problem after it appears, but also helps monitor the retina before changes begin to affect vision.

Trusted medical references, such as Mayo Clinic, indicate that the risk of diabetic retinopathy increases with the duration of diabetes and poor blood sugar control. For this reason, assessment should not depend on symptoms alone, as the patient may not feel any problem at first despite the presence of mild retinal changes.

What causes the effect of diabetes on the retina?

The effect of diabetes on the eye does not usually happen because of one factor only. It results from several factors that affect the blood vessels inside the retina.

The main causes and risk factors include:

High blood sugar levels for long periods.
Diabetes for years.
High blood pressure.
High cholesterol or blood fats.
Smoking.
Pregnancy in women with diabetes.
Irregular fundus examination.
Previous retinal changes related to diabetes that were not followed up.

The Saudi Ministry of Health explains that the risk of diabetes-related retinal and eye diseases increases with high blood sugar, high blood pressure, high cholesterol, smoking, pregnancy, and long duration of diabetes.

What are the symptoms of retinal disease caused by diabetes?

In the early stages, the patient may not feel any clear symptoms. For this reason, daily vision quality alone is not enough, because some retinal changes may begin without pain or noticeable blurred vision.

The following symptoms may appear as the condition progresses and the effect of diabetes on the retina increases:

Blurred vision.
Spots in the field of vision.
Difficulty seeing in dim light.
Weakness or changes in color vision.
Vision changes from day to day.
Difficulty reading or seeing fine details.
Retinal bleeding in diabetic patients in advanced cases, which may appear as many floaters or a sudden decrease in vision.

The NHS explains that diabetic retinopathy usually does not cause symptoms at first. Later, symptoms may appear, such as worsening eyesight, blurred vision, floaters, and difficulty seeing in low light.

What are the stages of diabetic retinopathy?

Diabetic retinopathy passes through different grades. Having an early stage does not necessarily mean that the condition will progress if medical follow-up is maintained and blood sugar and blood pressure are controlled.

Stage	What happens in the eye?	Why is it important?
Mild non-proliferative retinopathy	Some small blood vessels begin to weaken or leak	There may be no clear symptoms
Moderate or severe non-proliferative retinopathy	Blood vessel changes inside the retina increase	The patient needs closer follow-up
Proliferative retinopathy	New weak blood vessels that can bleed begin to form	The patient may need specialized treatment
Retinal leakage or macular edema	Fluid collects in the central vision area	It may cause blurred reading and difficulty seeing details

Cleveland Clinic explains that diabetes-related retinopathy is divided into non-proliferative and proliferative types. The proliferative type may involve the growth of new weak blood vessels that can cause bleeding or traction on the retina.

How is the effect of diabetes on the retina diagnosed?

Diagnosis depends on an eye examination by an ophthalmologist, not on symptoms alone. Vision may still be good at first despite mild retinal changes.

Diagnosis may include:

Measuring visual acuity.
Fundus examination after pupil dilation.
Retinal imaging.
OCT examination of the macula when needed.
Measuring eye pressure.
Evaluating the presence of retinal leakage or macular edema.
Determining the appropriate stage of diabetic retinopathy.

The Saudi Ministry of Health explains that diagnosis is performed through a dilated eye examination using drops to widen the pupil, along with a vision test and eye pressure measurement. The NHS also notes that screening for diabetic retinopathy may include imaging the back of the eye during regular screening appointments.

When should a diabetic patient examine the retina?

Regular examination is important even if vision is good. In some cases, the effect of diabetes on the retina may be silent at first.

According to the Saudi Ministry of Health guidelines:

Patients with type 1 diabetes: annual eye examination should begin within 5 years of diagnosis.
Patients with type 2 diabetes: annual eye examination should begin immediately after diagnosis.
Women who had diabetes before pregnancy: an eye examination is needed before pregnancy or during the first months, and additional follow-up may be needed according to the doctor’s opinion.

Doctors in the ophthalmology department at Magrabi explain that regular fundus examination helps detect changes early and choose the right follow-up or treatment before symptoms develop.

What are the treatment methods for diabetic retinopathy?

Treatment varies depending on the stage of the condition, the degree of retinal involvement, the presence of retinal leakage, and the condition of the macula. Therefore, there is no single treatment plan that suits all patients.

Treatment options to reduce the effect of diabetes on the retina may include:

Regular follow-up: for mild cases that do not affect vision.
Controlling blood sugar, blood pressure, and cholesterol: an essential step to reduce disease progression.
Retinal injections: may be used in cases of retinal leakage or macular edema according to the doctor’s assessment.
Retinal laser: may help in some cases of diabetic retinopathy, especially when abnormal blood vessels or specific leakage are present.
Vitrectomy and retinal surgery: may be used in cases of severe bleeding or retinal traction.
Treatment of associated eye problems: such as high eye pressure or cataract, if present.

The NHS explains that treatments may include laser, anti-VEGF injections, steroid implants in some cases, or surgery to remove blood or scar tissue from the back of the eye. Hamad Medical Corporation in Qatar also confirms that treatment may include laser, anti-VEGF injections inside the eye, or vitrectomy, depending on the type and severity of the condition.

Can retinal leakage be treated?

Retinal leakage or macular edema caused by the effect of diabetes on the retina can be managed through several treatment methods. However, choosing the suitable treatment depends on the retinal specialist’s assessment of each patient’s condition.

The doctor determines the treatment plan based on several factors, including:

The degree of leakage inside the retina.
How much the leakage affects visual clarity.
The presence of swelling in the macula.
Fundus examination results.
Retinal imaging or OCT results.
The level of blood sugar, blood pressure, and cholesterol control.
The presence of other complications, such as retinal bleeding or the growth of weak blood vessels.

Methods for managing retinal leakage may include:

Regular follow-up:

This may be suitable in mild cases that do not clearly affect vision, along with better blood sugar and blood pressure control.

Retinal injections:

Some injections inside the eye may help reduce leakage and swelling in the macula, especially if the leakage affects vision.

Retinal laser:

It may be used in selected cases to reduce leakage caused by weak blood vessels inside the retina.

Surgical intervention in advanced cases:

Some patients may need additional procedures if the leakage is accompanied by severe bleeding or other complications. The doctor determines this after examination.

Doctors at Magrabi indicate that treating retinal leakage caused by the effect of diabetes on the retina does not depend on one fixed procedure. Instead, it requires a personalized plan that suits the eye condition and the degree of visual involvement. Therefore, early examination and regular follow-up help choose the most appropriate treatment at the right time.

On the retina services page, you will find clearer information about the service, the conditions it treats, and Magrabi’s experience in this specialty.

Can diabetic retinopathy be treated with diet and medication only?

A healthy diet and diabetes medications help reduce the risk of diabetic retinopathy progression, but they are not always enough to treat changes that have already occurred inside the eye.

Controlling the following factors helps protect the retina as much as possible and reduce the effect of diabetes on the retina:

Controlling blood sugar levels.
Monitoring HbA1c regularly.
Controlling blood pressure.
Managing cholesterol and blood fats.
Taking diabetes medications as prescribed by the doctor.
Following a balanced diet.
Practicing suitable physical activity after consulting the doctor.
Quitting smoking.
Maintaining regular fundus examination.

However, in some cases, the patient may need direct eye treatment, especially when there is:

Leakage in the macula.
Bleeding in the retina.
Growth of new and weak blood vessels.
Clear deterioration in vision.
Advanced retinal changes.
Complications affecting the macula or vitreous body.

Therefore, the matter can be explained as follows:

Diet and diabetes medications: help reduce disease progression and protect the tiny blood vessels inside the retina.
Fundus examination: detects early changes even if the patient has no clear symptoms.
Specialized eye treatment: may be necessary if significant changes appear, such as leakage, bleeding, or abnormal blood vessels.

Doctors at Magrabi explain that managing diabetic retinopathy requires an integrated plan that combines diabetes control with regular follow-up by an ophthalmologist. The goal is to protect vision and detect any changes early before they affect daily life.

Can retinal leakage be treated?

Retinal leakage or macular edema can be managed through several treatment methods. However, choosing the suitable treatment depends on the retinal specialist’s assessment of each patient’s condition.

The doctor determines the treatment plan to reduce the effect of diabetes on the retina based on several factors, including:

The degree of leakage inside the retina.
How much the leakage affects visual clarity.
The presence of swelling in the macula.
Fundus examination results.
Retinal imaging or OCT results.
The level of blood sugar, blood pressure, and cholesterol control.
The presence of other complications, such as retinal bleeding or the growth of weak blood vessels.

Methods for managing retinal leakage may include:

Regular follow-up: may be suitable in mild cases that do not clearly affect vision, along with better blood sugar and blood pressure control.
Retinal injections: some injections inside the eye may help reduce leakage and swelling in the macula, especially if the leakage affects vision.
Retinal laser: may be used in selected cases to reduce leakage caused by weak blood vessels inside the retina.
Surgical intervention in advanced cases: some patients may need additional procedures if the leakage is accompanied by severe bleeding or other complications. The doctor determines this after examination.

Doctors at Magrabi indicate that treating retinal leakage does not depend on one fixed procedure. Instead, it requires a personalized plan that suits the eye condition and the degree of visual involvement. Therefore, early examination and regular follow-up help choose the most appropriate treatment at the right time.

Can diabetic retinopathy be treated with diet and medication only?

A healthy diet and diabetes medications help reduce the risk of diabetic retinopathy progression, but they are not always enough to treat changes that have already occurred inside the eye.

The following factors help protect the retina as much as possible:

Controlling blood sugar levels.
Monitoring HbA1c regularly.
Controlling blood pressure.
Managing cholesterol and blood fats.
Taking diabetes medications as prescribed by the doctor.
Following a balanced diet.
Practicing suitable physical activity after consulting the doctor.
Quitting smoking.
Maintaining regular fundus examination.

However, in some cases, the patient may need direct eye treatment, especially when there is:

Leakage in the macula.
Bleeding in the retina.
Growth of new and weak blood vessels.
Clear deterioration in vision.
Advanced retinal changes.
Complications affecting the macula or vitreous body.

Therefore, the matter can be explained as follows:

Diet and diabetes medications: help reduce disease progression and protect the tiny blood vessels inside the retina.
Fundus examination: detects early changes even if the patient has no clear symptoms.
Specialized eye treatment: may be necessary if significant changes appear, such as leakage, bleeding, or abnormal blood vessels.

How can the effect of diabetes on the eye be prevented?

Not all cases can be prevented, but the risk of diabetic retinopathy progression can be reduced through practical steps.

Magrabi doctors recommend the following to reduce the effect of diabetes on the retina:

Measuring blood sugar and monitoring HbA1c according to the doctor’s plan.
Controlling blood pressure and cholesterol.
Quitting smoking.
Not neglecting the annual fundus examination.
Visiting an ophthalmologist when any vision change appears.
Taking diabetes medications as prescribed by the doctor.
Maintaining a balanced diet.
Practicing suitable physical activity after consulting the doctor.
Seeking early follow-up during pregnancy if diabetes is present.
Avoiding eye drops or medications without a medical prescription.

The Saudi Ministry of Health recommends preventing diabetic eye disease through good control of blood sugar, blood pressure, and cholesterol, quitting smoking, and maintaining eye examination appointments.

When should you see a doctor?

Doctors at Magrabi recommend seeing an ophthalmologist if symptoms persist, worsen, or affect reading, driving, phone use, or daily activities.

Medical evaluation should be requested if you notice:

Sudden decrease in vision.
Sudden increase in floaters or dark spots.
Flashes of light.
A shadow or curtain over part of the field of vision.
Persistent blurred vision despite adjusting glasses.
New difficulty seeing details.
Pregnancy with pre-existing diabetes.
A long period without fundus examination.

The Saudi Ministry of Health recommends seeing a doctor immediately when sudden vision changes, flashes of light, more spots than usual, or something resembling a curtain pulled over the eye are noticed.

Frequently Asked Questions

How does diabetes affect the retina?

Diabetes affects the retina when prolonged high blood sugar damages the tiny blood vessels. Leakage, swelling, or the growth of weak blood vessels that can bleed may occur. Early examination helps detect changes before vision is affected.

What are the symptoms of diabetic retinopathy?

There may be no symptoms at first. As the condition progresses, blurred vision, floaters, dark spots, difficulty seeing at night, weak color vision, or sudden vision loss may occur when bleeding or complications develop.

When should a diabetic patient examine the retina?

Retinal examination is usually recommended annually. A patient with type 1 diabetes starts within 5 years of diagnosis, while a patient with type 2 diabetes starts immediately after diagnosis, with follow-up adjusted according to the doctor’s assessment and retinal condition.

Can retinal leakage be treated?

Retinal leakage can often be treated using options such as retinal injections, laser, or careful follow-up, depending on the severity of leakage and its effect on the macula. The doctor determines the suitable plan after examination and imaging.

Does diabetic retinopathy affect all diabetic patients?

Not necessarily. However, any diabetic patient may be at risk, especially with long disease duration or poor control of blood sugar, blood pressure, and cholesterol. Regular examination reduces the risk of detecting the condition at a late stage.

Is retinal bleeding in diabetic patients serious?

Retinal bleeding may be a sign of an advanced stage and requires prompt evaluation. It does not always mean permanent vision loss, but delayed examination may increase the risk of complications. Therefore, an ophthalmologist should be consulted when many floaters or sudden vision weakness occur.

To book an appointment in the retina department, you can contact us directly or fill out the booking form, and the Magrabi team will help you choose the suitable appointment.

The effect of diabetes on the retina may begin without clear symptoms. Therefore, regular fundus examination remains an important step for every diabetic patient. Controlling blood sugar, blood pressure, and cholesterol helps reduce the risk of diabetic retinopathy progression, while the ophthalmologist determines the appropriate treatment when leakage, bleeding, or macular changes are present. Early medical consultation gives the patient a better chance to preserve vision without unnecessary fear or exaggeration.

Medically reviewed by Dr. Bassam Al-Qadi.

Medical Disclaimer: The information in this article is for health education purposes only and does not replace a visit to a doctor or consultation with a qualified specialist. Magrabi doctors recommend seeking medical evaluation for an accurate diagnosis and appropriate treatment plan.