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Home » Eye Care Services » Eye Disease Management » Glaucoma Testing & Management

Glaucoma Testing & Management

Senior Citizen Couple, Glaucoma Eye Exams

Glaucoma is a leading cause of preventable vision loss and blindness in older individuals in the United States and Canada and the second leading cause of blindness in the World, even more than macular degeneration.

What is Glaucoma?

Glaucoma is not a single disease. It is actually a group of eye diseases that cause damage to the optic nerve due to an increase in pressure inside the eye, which is called intraocular pressure (IOP). When detected in the early stages, glaucoma can often be controlled, preventing severe vision loss and blindness. However, symptoms of noticeable vision loss often only occur once the disease has progressed. This is why glaucoma is called “the sneak thief of sight”. Unfortunately, once vision is lost from the disease, it usually can’t be restored.

Treatments include medication or surgery that can regulate the IOP and slow down the progression of the disease to prevent further vision loss. The type of treatment depends on the type and the cause of glaucoma.

Risk Factors

Prevention is possible only with early detection and treatment. Since symptoms are often absent, regular eye exams which include a glaucoma screening are essential, particularly for individuals at risk of the disease. While anyone can get glaucoma, the following traits put you at a higher risk:

  • Age over 60
  • Hispanic or Latino descent, Asian descent
  • African Americans over the age of 40 (glaucoma is the leading cause of blindness in African Americans, 6-8 times more common than in Caucasians.)
  • Family history of glaucoma
  • Diabetics
  • People with severe nearsightedness
  • Certain medications (e.g. steroids)
  • Significant eye injury (even if it occurred in childhood)

Understanding Glaucoma

Signs and Symptoms of Glaucoma: Due to a buildup of pressure in the eye, glaucoma causes damage to the optic nerve which is responsible for transmitting visual information from the eye to the brain. How does glaucoma affect your vision?

Types of Glaucoma: There are a number of types of glaucoma, some more acute than others. Learn about the common types of glaucoma and the differences between them.

Diagnosis and Treatment of Glaucoma: Early detection and treatment of glaucoma are essential to stopping or slowing the disease progression and saving vision. Treatment can include medicated eye drops, pills, laser procedures and minor surgical procedures depending on the type and stage of glaucoma.

Signs and Symptoms of Glaucoma

The intraocular pressure caused by glaucoma can slowly damage the optic nerve, causing a gradual loss of vision. Vision loss begins with peripheral (side) vision, resulting in limited tunnel vision. Over time if left untreated, central vision will also be affected which will increase until it eventually causes total blindness. Unfortunately, any vision that is lost from the optic nerve damage cannot be restored.

What are the Symptoms?

Typically, glaucoma sets in without any symptoms. At the early onset of the most common type of glaucoma “open angle” glaucoma, vision remains normal and there is no pain or discomfort. This is why the disease is nicknamed the “sneak thief of sight”.

An acute type of glaucoma, called angle-closure glaucoma, can present sudden symptoms such as foggy, blurred vision, halos around lights, eye pain, headache and even nausea. This is a medical emergency and should be assessed immediately as the intraocular pressure can become extremely high and cause permanent damage within hours.

Types of Glaucoma

The primary forms of glaucoma are open-angle and narrow-angle, with open-angle being the most common type.

Primary open-angle glaucoma (POAG)

POAG gradually progresses without pain or noticeable vision loss initially affecting peripheral vision.  By the time visual symptoms appear, irreparable damage has usually occurred, however, the sooner treatment starts the more vision loss can be prevented.  When untreated, vision loss will eventually result in total loss of side vision (or tunnel vision) and eventually total vision loss.

Normal-tension glaucoma or low-tension glaucoma

This is another form of open-angle glaucoma in which the intraocular pressure remains within the normal level. The cause of this form of glaucoma is not known, but it is believed to have something to do with insufficient blood flow to the optic nerve, causing damage. Individuals of Japanese descent, women and those with a history of vascular disease or low blood pressure are at higher risk.

Angle-closure glaucoma

Acute angle-closure glaucoma is marked by a sudden increase in eye pressure, which can cause severe pain, blurred vision, halos, nausea, and headaches. The pressure is caused by a blockage in the fluid at the front of the eye which is a medical emergency and should be treated immediately. Without prompt treatment to clear the blockage vision can be permanently lost.

Congenital glaucoma

The inherited form of the disease that is present at birth. In these cases, babies are born with a defect that slows the normal drainage of fluid out of the eye; they are usually diagnosed by the time they turn one. There are typically some noticeable symptoms such as excessive tearing, cloudiness or haziness of the eyes, large or protruding eyes or light sensitivity. Surgery is usually performed, with a very high success rate, to restore full vision.

Secondary glaucomas

Glaucoma can develop as a complication of eye surgeries, injuries or other medical conditions such as cataracts, tumors, or a condition called uveitis which causes inflammation. Uncontrolled high blood pressure or diabetes can result in another serious form called neovascular glaucoma.

Pigmentary glaucoma

A rare form of glaucoma, this occurs when pigment from the iris sheds and clogs the drainage of fluid from the eye resulting in inflammation and damage to the eye and drainage system.

Treatment of glaucoma is dependant upon the severity and type of glaucoma present.

Glaucoma Diagnosis and Treatment

Detecting Glaucoma

During a routine comprehensive eye exam to check for glaucoma, your eye doctor will dilate your eye to examine the optic nerve for signs of glaucoma and will also measure the intraocular pressure (IOP) with an instrument called a tonometer.

IOP Measurement

Tonometry involves numbing the eye with drops and then gently pressing on the surface of the eye to measure the pressure. Since your IOP can fluctuate throughout the day and glaucoma can exist without elevated IOP this is not enough to rule out the disease. If there are signs of the disease, further testing will be performed.

Visual Field Test

A visual field test is designed to detect any blind spots in your peripheral or side field of vision. You will be asked to place your head in front of a machine while looking ahead and indicate when you see a signal in your peripheral field of view.

Retina Testing

Your doctor may also measure the thickness of the cornea with an ultrasonic wave instrument in a test called pachymetry or use imaging techniques such as digital retina scanning or optical coherence tomography (OCT) to create an image of your optic nerve to look for glaucoma damage.

Treating Glaucoma

Treatment for glaucoma depends on the type and severity of the disease and can include medication such as eye drops or pills or laser or traditional surgery.

Medication

Medication and drops to lower IOP are often the first resort for controlling pressure-related glaucoma. These drops may have some uncomfortable side effects, but compliance with the treatment plan is essential for preserving vision and halting the progression of the disease.

Surgery

Surgical procedures are designed to control the flow of fluids through the eye by either decreasing the amount of fluid produced or improving the drainage. Your Blackfoot eye doctor may decide that a combination of surgery and medication will be the most effective in many cases.

Prevention

It cannot be stressed enough that the most effective treatment for glaucoma happens when the disease is detected and treated early before significant vision loss occurs. Any vision that is lost cannot be restored. This is why the best prevention is awareness by knowing your risks and taking responsibility by having your eyes examined on a regular basis.

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To Our Valued Patients:

Complete Family Eye Care has always been committed to the health and safety of our patients, our staff, and our community.

Because of the current spread of the Coronavirus (COVID-19), we want to assure you that it has been our commitment for years to sterilize each piece of equipment either immediately before or immediately after each use to insure no germs are spread from one patient to another. We have always been proud of this commitment, so for us…it remains ‘business as usual’ and please be assured that we’ve got your back!

While cleanliness has always been a top priority of our practice, we are also increasing our frequency in which ‘high touch’ areas will be cleaned and sterilized, such as our reception chairs and tables as well as our restrooms and children’s play area and toys. You’ll notice that we have also removed magazines from our reception area to help ensure a sterile environment. Additionally, we are also sterilizing each eyeglass frame after our patients try them on. We continue to practice good hygiene by demanding our doctors and staff to wash their hands frequently with anti-bacterial soap or to use a high-percentage alcohol hand sanitizer.

One of the ways Coronavirus is transmitted is by touching the eyes. We highly recommend you take extra precautions of washing your hands before handling contact lenses. We also recommend you frequently sterilize or replace your contact lens case. As usual, always use approved contact lens solutions and follow the directions for proper use. We also recommend you consider wearing glasses more often, rather than contacts, to reduce the amount of eye contact.

We are actively monitoring both local and national information about the Coronavirus and are continuing to do everything we can to keep our practice a clean and safe environment for you and your family. Complete Family Eye Care will continue to closely monitor COVID-19 and will follow the guidelines provided by local and national organizations like the CDC and WHO, and can assure you that our practice remains a safe place to continue your uninterrupted eye health care.

We felt it important to keep you updated, and If you have any questions or concerns, please feel free to give us a call.

Thank you for being such a valued patient,

Dr. Cody Jones and the Staff at Complete Family Eye Care