Glaucoma is a major cause of blindness that is referred to as the “silent thief of sight” because patients often do not notice anything in its early stages. This class of ocular illnesses slowly degenerates the optic nerve. If not treated, it can lead to permanent blindness.
Severe visual loss can be prevented through early detection and treatment.
Let us explain the early signs of glaucoma so that you can act in time and protect your vision.
Understanding Glaucoma
In patients with glaucoma, the optic nerve deteriorates due to high eye pressure (intraocular pressure or IOP). There are some kinds of glaucoma that may develop even when the eye pressure is normal. So, it’s crucial to have your doctor examine the inside of your eyes, specifically where the optic nerve is located.
There are two primary types of glaucoma:
1. Open-Angle Glaucoma (the most common form): The drainage canals in the eye become blocked and this gradually causes an increase in intraocular pressure and results in the damaging of the optic nerve.
2. Angle-Closure Glaucoma (less common but more dangerous): The iris is situated too near to the drainage canals in the eye that when this tissue closes, pressure builds up instantly, calling for a medical emergency.
Are you at high risk for developing glaucoma? Read on to find out!
These are individuals who are more likely to have glaucoma:
- Age (40 and older)
- Family history of glaucoma
- High intraocular pressure (IOP)
- Chronic diseases such as diabetes and high blood pressure
- Nearsightedness (myopia)
- Long-term corticosteroid use
- History of eye injuries
If you are one of the above, then frequent checkups to the ophthalmologist are recommended to diagnose glaucoma in its early stages. Here’s how you can spot its early signs:
Early Symptoms of Glaucoma
Gradual loss of peripheral vision: This is one of the very earliest and most common presentations of open-angle glaucoma. Since central vision remains intact until much later in the course of the disease, most individuals with glaucoma are unaware that they have lost substantial vision until much damage has taken place. You might first experience slight blind spots on the periphery of your field of vision and you may start running into things or people while unaware of what you are doing.
Things to be aware of:
- Difficulty focusing or seeing movement peripherally: You should move your head often while in motion or walking so that you get an excellent view.
- Seeing Halos Around Lights: Halos or rainbow-colored circles around bright lights are other critical symptoms of glaucoma, particularly angle-closure glaucoma.
- Pain or Headaches: Severe pain in one or both eyes usually occurs within hours in angle-closure glaucoma. It may be accompanied by severe headaches and nausea with vomiting due to rapid build-up of pressure on the eyes.
- Sudden sharp eye pain: Severe headache or pain accompanied by blurred vision or a sense of discomfort in one or both eyes.
- Blurred or misty vision: A further indication of early glaucoma is blurred or misting uppers particularly evident at low light levels.
- Problems in focusing on objects or reading: Even with glasses on, the vision appears slightly blurred or foggy.
- Redness in the Eye: Glaucoma can cause an eye to become red and irritated due to increased pressure. Although redness can be caused by many different factors (such as allergies or fatigue), persistent redness, especially when accompanied by other symptoms, must prompt an immediate visit to your eye care professional.
- Tunnel Vision in Late Stages: If glaucoma is not treated, the condition progresses to its more advanced stages wherein the central vision deteriorates. Narrowed visual field that feels like looking through a tunnel or straw indicates severe damage of the optic nerve and immediate medical attention is warranted.
Why Regular Eye Exams Are Important:
Early symptoms of glaucoma may be silent that a complete eye exam is the best way to determine whether you have glaucoma. Your eye doctor can check your intraocular pressure, examine your optic nerve for damage, and test your peripheral vision.
How Often Should I Get Tested?
- Younger than 40 Every 2 to 4 years unless at risk.
- Ages 40 to 54: Every 1 to 3 years.
- Ages 55 to 64: Every 1 to 2 years.
- Over 65: Every 6 to 12 months.
- You may need more frequent eye checks, depending on your level of risk for glaucoma, especially if with a family history of glaucoma.
Treatment available for the Glaucoma:
Early detection means glaucoma can be well-managed with medical and/or surgical treatments to stop or significantly slow further vision loss. Treatment options include:
- Medicated eye drops for lowering intraocular pressure.
- Laser therapy improves drainage of the fluid inside the eye.
- Operation in advanced stages to develop a new outflow tract.
Conclusion:
Timely treatment is essential to prevent permanent eye damage. Recognizing early signs and getting regular eye check-ups can help protect your vision and prevent glaucoma from progressing to blindness. Don’t let the risk go unchecked—prioritize your eye health today. The sooner you diagnose and treat it, the better your chances of preserving your sight for life.
References:
Cleveland Clinic (2024). Glaucoma: Symptoms, causes, types & treatment. https://my.clevelandclinic.org/health/diseases/4212-glaucoma
Mayo Clinic (2022). Mayo Foundation for Medical Education and Research. Glaucoma. https://www.mayoclinic.org/diseases-conditions/glaucoma/symptoms-causes/syc-20372839
Wolf Eye Clinic. https://www.wolfeeyeclinic.com/filesimages/Glaucoma/GlaucomaEyeDiagram-min-min.jpg