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What is Glaucoma and How Does It Affect Your Vision?

What is Glaucoma?

Glaucoma is an eye disease that can damage the optic nerve. The optic nerve sends visual information from your eye to your brain. Often, glaucoma is linked to high pressure inside the eye. However, it can also occur with normal eye pressure. Over time, this damage can lead to vision loss or even blindness. Because glaucoma usually develops slowly, many people do not notice symptoms at first. Early detection is important to protect your eyesight.

Common Symptoms of Glaucoma

Most types of glaucoma do not cause pain or early warning signs. Still, some people may notice changes as the disease progresses. For example, you may experience:

  • Gradual loss of side (peripheral) vision
  • Blurred vision or seeing halos around lights
  • Eye pain or redness (in rare cases)
  • Severe headache or nausea (with sudden pressure rise)

    • Because symptoms can be mild or absent, regular eye exams are important. Early treatment can help prevent serious vision loss.

    Causes and Risk Factors

    Glaucoma often develops when fluid builds up in the front part of the eye. This extra fluid increases eye pressure, which can damage the optic nerve. However, some people get glaucoma even with normal eye pressure. Several factors can raise your risk, such as:

  • Age over 40 years
  • Family history of glaucoma
  • High eye pressure
  • Diabetes or high blood pressure
  • Previous eye injury or surgery
  • Long-term use of steroid medicines
  • African, Asian, or Hispanic background

    • Knowing your risk factors can help you and your doctor take steps to protect your vision.

    How is Glaucoma Diagnosed?

    Doctors use several tests to check for glaucoma. Usually, these tests are quick and painless. For example, your eye specialist may:

  • Measure your eye pressure (tonometry)
  • Check your side vision (visual field test)
  • Examine your optic nerve with special tools
  • Look at the thickness of your cornea

    • Regular eye exams are the best way to catch glaucoma early. The CDC and WHO recommend eye checks every 1-2 years for people at risk.

    Treatment Options for Glaucoma

    While there is no cure for glaucoma, treatment can slow or stop vision loss. Your doctor will choose the best plan based on your needs. Common glaucoma treatment options include:

  • Prescription eye drops to lower eye pressure
  • Oral medicines (in some cases)
  • Laser therapy to improve fluid drainage
  • Surgery to create a new drainage path

    • Because glaucoma is a lifelong condition, you may need ongoing treatment and regular check-ups. Following your doctor’s advice can help protect your vision.

    Lifestyle Tips and Prevention

    Although you cannot always prevent glaucoma, healthy habits may lower your risk. For example, you can:

  • Get regular eye exams, especially if you have risk factors
  • Manage health conditions like diabetes and high blood pressure
  • Wear eye protection during sports or risky activities
  • Take prescribed eye drops as directed
  • Eat a balanced diet rich in fruits and vegetables

    • Additionally, staying active and not smoking can support overall eye health. Early action makes a big difference in preventing glaucoma-related vision loss.

    When to See an Eye Specialist

    If you notice changes in your vision, do not wait to seek help. For instance, see an eye specialist if you have:

  • Sudden vision loss or blurred vision
  • Severe eye pain or redness
  • Halos around lights
  • Family history of glaucoma

    • Even if you have no symptoms, regular eye exams are important. Early diagnosis and treatment can help save your sight.

    Frequently Asked Questions about Glaucoma

  • Can glaucoma be cured?
  • No, but treatment can slow or stop vision loss.
  • Who is most at risk for glaucoma?
  • Older adults, people with a family history, and those with certain health conditions are at higher risk.
  • How often should I get my eyes checked?
  • Most experts suggest every 1-2 years, or more often if you have risk factors.
  • Does glaucoma always cause symptoms?
  • No, many people have no symptoms until vision loss occurs.
  • What happens if glaucoma is not treated?
  • Untreated glaucoma can lead to permanent vision loss or blindness.

    • For more information, consult an eye specialist for personalized advice on glaucoma. Early action can help protect your vision for years to come.