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Published on: May 04, 2022
3 minute read
By: Second Medic Expert

Glaucoma Causes, Symptoms, Diagnosis & Treatment

Glaucoma is a group of diseases that damage the eye's optic nerve. The optic nerve carries information from the eye to the brain. Glaucoma can cause vision loss and blindness. It is one of the leading causes of blindness in the world. There are no early warning signs of glaucoma. It may take years for vision loss to occur. The only way to prevent blindness from glaucoma is to get regular eye exams and treat it early.

Glaucoma is diagnosed with a comprehensive eye exam that includes a test for your visual field, which measures your side vision. Treatment for glaucoma depends on the type and severity of disease. Glaucoma is a condition that causes damage to the optic nerve. This damage results in a gradual loss of vision, typically leading to blindness. While the cause of glaucoma is not completely understood, it is known that the pressure within the eye (intraocular pressure) plays a role in its development.

High intraocular pressure damages the optic nerve by causing fluid to build up and pushing against the optic nerve fibers. The high pressure can also damage the tiny blood vessels at the back of the eye (retina), which can lead to vision loss. Glaucoma can be diagnosed through a comprehensive dilated eye exam, which includes an evaluation of your visual field and measurement of your intraocular pressure. Glaucoma is a group of eye diseases that damage the optic nerve. It can lead to blindness. The most common type is primary open-angle glaucoma. Angle closure glaucoma, in which the angle between the iris and cornea closes up, is another type. Most people with glaucoma have no early symptoms. If you do have symptoms, they may include blurred vision, halos around lights, eye pain or redness, headaches, and nausea. Often by the time these symptoms develop it is too late for treatment to save vision.

Glaucoma can cause permanent vision loss and blindness. Glaucoma often has no early warning signs, so it's important to get regular eye exams. The main types of glaucoma are open-angle glaucoma and angle-closure glaucoma. Open-angle glaucoma is the most common type of glaucoma. It develops slowly over many years and usually has no symptoms in the early stages. Angle-closure glaucoma is a less common type of glaucoma that can cause a sudden increase in eye pressure.

Glaucoma is a group of eye diseases that can lead to vision loss and blindness. It is caused by damage to the optic nerve. The optic nerve is a bundle of nerve fibers that connects the eye to the brain. The most common type of glaucoma is open-angle glaucoma, which is not caused by an injury or an infection. Open-angle glaucoma develops slowly over time. The other main type of glaucoma is angle-closure glaucoma, which can develop quickly and cause a sudden increase in pressure inside the eye. This pressure can damage the optic nerve and lead to vision loss and blindness

Glaucoma is a group of diseases that damage the eye’s optic nerve. The optic nerve carries visual images from the eye to the brain. Most people with glaucoma don’t know they have it because there are usually no symptoms in the early stages. Vision loss can occur gradually and may not be noticed until significant damage has occurred. There are several types of glaucoma, but the most common type is open-angle glaucoma. Treatment for glaucoma depends on the type and severity of the disease. Options include eyedrops, laser therapy, or surgery.

Glaucoma is caused by damage to the optic nerve, which transmits images from the eye to the brain. Most people with glaucoma don't notice any early symptoms. That's why it's important for people at risk for glaucoma—such as those with a family history of the disease or African Americans over age 40—to get regular eye exams. The only way to prevent vision loss from glaucoma is to diagnose it early and start treatment immediately. Treatment may include prescription eye drops or surgery.

Glaucoma is the second leading cause of blindness in the world. It is a silent thief because often there are no symptoms until significant vision damage has occurred. Most people with glaucoma don't know they have it until they have lost some vision. Vision loss from glaucoma can be gradual or sudden, but it almost always occurs over time. Early in the disease, you may not notice any changes at all in your vision.

Glaucoma can cause vision loss and blindness. The damage is usually due to an increase in pressure in the eye, which is called intraocular pressure (IOP). Most people with glaucoma don't have any symptoms until significant damage has occurred. Symptoms may include a gradual loss of peripheral vision, difficulty seeing at night, a change in pupil size or color, and red eyes.

If you have any of these symptoms, see an ophthalmologist as soon as possible for diagnosis and treatment. Untreated glaucoma can lead to permanent vision loss within a few years.

Glaucoma is a condition in which the optic nerve is damaged, leading to vision loss. It's often caused by an increase in pressure within the eye, called intraocular pressure (IOP). Some common symptoms of glaucoma include: a feeling of pressure in the eyes, blurred vision, and seeing halos around lights. Glaucoma can be diagnosed with a comprehensive eye exam that includes measuring IOP and checking for signs of optic nerve damage. Treatment for glaucoma depends on the severity of the condition and may include medication to reduce IOP, laser treatment, or surgery. Early diagnosis and treatment are essential to preserving vision.

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Role of Nutrition in Disease Prevention: How Food Choices Shape Long-Term Health

Disease prevention is no longer limited to vaccinations and medical screenings. Modern healthcare increasingly recognises nutrition as one of the most powerful tools for preventing illness before it begins. The role of nutrition in disease prevention is especially important in India, where lifestyle-related diseases account for a large share of premature illness and mortality.

According to the Indian Council of Medical Research (ICMR) and the National Family Health Survey (NFHS-5), poor dietary patterns contribute significantly to rising cases of diabetes, heart disease, obesity and hypertension. Unlike genetic factors, nutrition is a modifiable risk factor, meaning everyday food choices can actively protect health.

Why Nutrition Is Central to Disease Prevention

1. Nutrition regulates metabolic health

Balanced diets help maintain:

healthy blood sugar levels
optimal cholesterol balance
stable blood pressure

Disruption in these systems increases disease risk.

2. Nutrition strengthens immunity

WHO highlights that immune function depends heavily on adequate intake of vitamins, minerals and protein.

3. Nutrition controls inflammation

Chronic low-grade inflammation is linked to most lifestyle diseases. Diets rich in whole foods reduce inflammatory markers.

Major Diseases Influenced by Nutrition

Diabetes and Prediabetes

Excess refined carbohydrates and sugar drive insulin resistance.

Preventive nutrition focuses on:

whole grains
fibre-rich vegetables
adequate protein
controlled portion sizes

ICMR data shows that dietary modification can delay or prevent type 2 diabetes in high-risk individuals.

Cardiovascular Disease

Heart disease remains a leading cause of death in India.

Nutrition impacts:

cholesterol levels
blood pressure
arterial inflammation

Diets low in trans fats and high in fibre significantly reduce cardiovascular risk, as confirmed by WHO and Lancet studies.

Obesity

Obesity increases the risk of multiple chronic diseases.

Preventive nutrition addresses:

calorie density
food quality
satiety regulation

NFHS-5 reports a steady rise in overweight and obesity across age groups.

Hypertension

High sodium intake and low potassium intake contribute to high blood pressure.

Preventive dietary strategies include:

reducing processed foods
increasing fruits and vegetables
maintaining mineral balance

Certain Cancers

Diet influences cancer risk through:

antioxidant intake
fibre consumption
reduced exposure to carcinogenic compounds

WHO estimates that a significant percentage of cancers are preventable through diet and lifestyle changes.

Key Nutrients That Support Disease Prevention

Fibre

Supports gut health, blood sugar control and cholesterol reduction.

Protein

Essential for muscle health, immune function and metabolic balance.

Healthy Fats

Omega-3 fats reduce inflammation and protect heart health.

Micronutrients

Iron, zinc, vitamin D and B vitamins are essential for metabolic and immune regulation.

NFHS-5 highlights widespread micronutrient deficiencies in India, increasing disease vulnerability.

Role of Gut Health in Prevention

The gut microbiome plays a major role in:

immune regulation
inflammation control
nutrient absorption

Fermented foods and fibre-rich diets support healthy gut bacteria, strengthening disease resistance.

Why Preventive Nutrition Works Best Early

Nutrition is most effective when applied:

before disease onset
during pre-disease stages
alongside regular health screening

Once disease progresses, nutrition remains supportive but may not reverse damage fully.

Nutrition vs Medication in Prevention

Medication treats disease; nutrition reduces risk.

WHO and NITI Aayog emphasize that:

preventive nutrition reduces disease incidence
lifestyle modification lowers healthcare burden
early nutrition changes reduce dependency on long-term medication

Both approaches work best when combined appropriately.

Workplace and Community Role in Preventive Nutrition

Structured nutrition programs at workplaces and communities:

improve awareness
support behaviour change
reduce population-level disease burden

Lancet studies show that group-based nutrition interventions improve long-term adherence.

Common Myths About Nutrition and Disease Prevention

Myth 1: Supplements replace healthy food

Whole foods provide better long-term protection.

Myth 2: Prevention requires extreme diets

Consistency matters more than restriction.

Myth 3: Nutrition only matters after diagnosis

Early nutrition is most effective before disease develops.

Building a Preventive Nutrition Routine

Effective preventive nutrition includes:

regular meals
diverse food groups
portion awareness
minimal processed foods
hydration

Small daily choices compound into long-term health benefits.

Long-Term Impact of Preventive Nutrition

Consistent healthy eating leads to:

reduced disease risk
improved energy and productivity
better immune resilience
lower healthcare costs
improved quality of life

NITI Aayog identifies nutrition as a cornerstone of sustainable healthcare systems.

Conclusion

Understanding the role of nutrition in disease prevention empowers individuals to take control of their health long before illness develops. Balanced, consistent nutrition reduces inflammation, supports immunity and protects against chronic diseases that burden India’s healthcare system. Preventive nutrition is not about short-term fixes but about building lifelong habits that support health, resilience and longevity.

References

ICMR – Nutrition and Lifestyle Disease Prevention Reports
National Family Health Survey (NFHS-5) – Dietary and Metabolic Health Data
NITI Aayog – Preventive Healthcare and Nutrition Strategy Reports
WHO – Diet, Nutrition and Chronic Disease Prevention Guidelines
Lancet – Nutrition and Disease Risk Reduction Studies
Statista – Dietary Trends and Health Outcomes India
EY-FICCI – Preventive Healthcare and Nutrition Economics

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