Glaucoma

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Glaucoma by San Antonio Eye Center

What Is Glaucoma?
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Glaucoma is a potentially blinding eye condition that manifests in different ways. Because the signs, symptoms, and treatment of the different types of glaucoma are so varied, one person with glaucoma may have sudden pain and redness, while another may have no symptoms at all.

In general, glaucoma is an eye condition that develops when too much pressure builds up inside of the eye. It tends to be inherited and may not show up until later in life. The increased pressure, called intraocular pressure (IOP), can damage the optic nerve, which transmits images to the brain. If damage to the optic nerve from high IOP continues, glaucoma will cause loss of vision. Without treatment, glaucoma can cause total, permanent blindness within a few years.
There are two main types of glaucoma - open-angle glaucoma and angle-closure glaucoma. Open-angle glaucoma is also referred to as wide-angle glaucoma and is the most common type of glaucoma. The structures of the eye appear normal, but fluid in the eye does not flow properly through the eye's filter, called the trabecular meshwork.
Angle-closure glaucoma, also called acute or chronic angle-closure or narrow-angle glaucoma, is less common than open-angle glaucoma, but can cause a sudden build-up of pressure in the eye. Drainage may be poor because the angle between the iris and the cornea (where a drainage channel for the eye is located) is too narrow. Or, the pupil opens too wide, narrowing the angle and blocking the flow of the fluid through that channel.

Globally glaucoma is the second leading cause of blindness, affecting 6.7 million people in 2000. Worldwide, an estimated 66.8 million people have glaucoma, and most are not even aware of it. That number is predicted to grow past 80 million by 2020.
Global causes of blindness as a percentage of total blindness (WHO Report 2002) 
What Are the Symptoms of Glaucoma?

For most people, there are usually few or no symptoms of glaucoma. The first sign of glaucoma is often the loss of peripheral or side vision, which can go unnoticed until late in the disease. Detecting glaucoma early is one reason you should have a complete exam from an eye specialist every year. Occasionally, IOP can rise to severe levels. In these cases sudden eye pain, headache, blurred vision, or the appearance of halos around lights may occur.
If you have any combination of the following symptoms, contact your physician immediately:

  • Seeing halos around lights 
  • Narrowing of vision (tunnel vision) 
  • Vision loss 
  • Redness in the eye 
  • Eyes that look hazy 
  • Nausea or vomiting 
  • Pain in the eye 



Who Does Glaucoma Affect?

Glaucoma most often occurs in adults over age 60, but it can also occur in young adults or children and is more common in those of African descent. In addition, if you have a history of glaucoma in your family, have poor vision (in particular, are severely nearsighted or shortsighted) or diabetes, you are at a greater risk of developing glaucoma than those individuals who do not.

How to Avoid the Progression of Glaucoma

Most of the risk factors such as age, race, and genetics for glaucoma are beyond your control. However, because most people with glaucoma have no early symptoms or pain from this increased pressure, it is important to see your eye care professional regularly so that glaucoma can be diagnosed and treated before long-term vision loss occurs. If there is a history of glaucoma in your family or if you have other risk factors for glaucoma, talk with your health professional about having more frequent exams. Wear protective eye gear when necessary to avoid blunt trauma to the eye, which can cause traumatic glaucoma.


How Is Glaucoma Treated?

Glaucoma treatment often includes prescription eye drops, but can also include surgery (click here for surgical video). Eye drop treatments reduce the formation of fluid in the front of the eye or increase its outflow. Side effects of glaucoma drops may include redness of the eyes, brief stinging or visual blurring, and irritated eyes. Be aware that some glaucoma medications may affect the heart and lungs. Surgical glaucoma treatment helps with the drainage of the eye allowing the fluid to flow and maintain a healthy level of internal pressure.

Latest News About Glaucoma 

Many Have Trouble Using Glaucoma Eyedrops
Is there a better way to get glaucoma meds into the eyes without spilling them and contaminating the bottle tip? 

Serious Health Problems Go Hand-in-Hand With Glaucoma
Massive study finds that people with glaucoma tend to have other big health problems, such as diabetes and high blood pressure. Is there a link? 

Producer With Glaucoma Creates Vision Loss Film
What is it like to lose vision from eye disease? New documentary tells how people deal with their vision loss. >>


Questions about Glaucoma or have Glaucoma?

To learn more about glaucoma or to schedule a glaucoma screening or other eye examination, call us at 210-226-6169 or email us at San Antonio Eye Center today, we will be happy to answer your questions and can advise you of your options, allowing you to make the best choice for your vision.

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