What Are the First Signs of Glaucoma?

Medically reviewed by Dr. Brad Snead

What makes glaucoma a difficult condition is that there may not be an obvious first sign that it’s developing. The most common form, open-angle glaucoma, often develops gradually without causing noticeable symptoms in its early stages. You may continue to see clearly and go about your normal activities while changes are occurring to the optic nerve.

Glaucoma often affects peripheral vision first when vision changes begin. You may not even realize that your vision has deteriorated until the disease has progressed. And by the time you notice the impacts, glaucoma may have already caused permanent vision loss.

This is one reason regular eye exams and reporting vision changes are so important. No single pattern of glaucoma affects every patient in exactly the same way. Everyone’s eyes are different, and factors such as age, family history, eye anatomy and overall health can influence your risk factors and how the condition develops. Comprehensive eye exams allow your eye doctor to evaluate your individual eye health and look for changes that may not yet be affecting your vision.

While there may be no noticeable early signs of glaucoma, knowing what symptoms to watch for can help you recognize when it’s time to seek an evaluation.

What Are the Early Signs of Glaucoma?

While proactive care is usually the best defense, it’s important to understand if you’re experiencing early glaucoma symptoms in case they do begin to develop. These possible symptoms often begin with changes to peripheral vision.

Some possible early signs of glaucoma include:

  • Gradual loss of peripheral vision: You may begin having difficulty seeing objects or movements out of the corners of your eyes. These early vision changes are easy to overlook because central vision often remains clear.
  • Blind spots: You may develop areas of missing vision as the condition progresses. These blind spots can be subtle at first and may be hard to detect during everyday activities.
  • Difficulty seeing in low light: Some people with glaucoma notice changes in their ability to see in dim lighting or adjusting between different lighting conditions.
  • Blurred vision or halos around lights: These symptoms can occur with certain types of glaucoma. However, they can also be caused by other eye conditions, such as cataracts.

    • It’s important to remember that these symptoms don’t necessarily mean you have glaucoma. Many eye conditions can cause similar vision changes, which is why it’s important to schedule an eye exam to determine the underlying cause.

    Because glaucoma develops differently from one person to another, your eye doctor can consider your unique anatomy and risk factors when developing a treatment plan and monitoring changes.

    Symptoms of Acute Angle-Closure Glaucoma

    While open-angle glaucoma typically develops gradually, acute angle-closure glaucoma symptoms can suddenly appear. Acute angle-closure glaucoma occurs when the eye’s drainage angle becomes blocked, causing eye pressure to rapidly rise. This condition can damage the optic nerve and requires immediate medical attention.

    Acute angle-closure glaucoma symptoms may include:

    • Severe eye pain
    • Sudden blurred vision
    • Redness in the eye
    • Halos around lights
    • Nausea or vomiting
    • Severe headache

    Acute angle-closure glaucoma is an eye emergency. Seek immediate medical attention if you experience sudden severe eye pain, vision changes or other symptoms that are associated with this condition. Prompt treatment lowers the eye pressure and reduces the risk of permanent vision loss.

    Not everyone with glaucoma will experience these symptoms. In fact, the more common open-angle form often causes no noticeable symptoms until vision loss has occurred.

    When Should You See an Eye Doctor for Glaucoma Symptoms

    Don’t wait for the first signs of glaucoma before you have your eyes examined for the condition. Proactive care is the best way to protect your vision, as it allows your eye doctor to detect the disease early and monitor changes over time.

    You should schedule an eye exam if you are having trouble seeing to the sides, discover new blind spots, experience blurred vision or have any other vision changes that affect your everyday activities.

    If you have risk factors for glaucoma, such as a family history of the disease, your eye doctor may also recommend more frequent exams, even if you haven’t experienced any glaucoma symptoms.

    Protect Your Vision From Glaucoma at Snead Eye Group

    Glaucoma can affect everyone differently, and early detection is an important part of protecting your vision. Even if you haven’t noticed any signs of glaucoma, regular eye exams can help your eye doctor detect disruptions in your sight and determine the appropriate treatment.

    At Snead Eye Group, our team provides comprehensive eye exams and glaucoma care for patients in Fort Myers, Naples, Cape Coral and Bonita Springs, FL. We’ll take the time to understand your unique needs and develop an eye care plan that’s as individual as your iris.

    If you have concerns about glaucoma symptoms or if it’s time for your next eye exam, contact Snead Eye Group today to schedule an appointment.