Let's learn exactly about open-angle glaucoma!

Have you ever thought that our eyes can develop diseases secretly, without any warning? There are actually some eye diseases that we don't even know are coming, and by the time we realize it, the damage has already been done. One such eye disease that comes secretly and damages our vision and is common among many people is called open-angle glaucoma . Let's talk about this in detail today, because it is very important to be aware of this.

What is Open-Angle Glaucoma?

Simply put, Open-Angle Glaucoma is the most common type of glaucoma. It is caused by damage to the optic nerve inside your eye. Think of it like a small drainage system inside your eye. This is where the fluid produced inside the eye (we call it the aqueous humor) is drained out. In Open-Angle Glaucoma, this drainage system slowly, very slowly, starts to become blocked. You don't feel it at all.

When this fluid cannot drain properly, it starts to accumulate inside the eye. This causes the pressure inside the eye (intraocular pressure - IOP) to increase. This is called ocular hypertension . This increased pressure is what causes damage to the optic nerve mentioned earlier.

Open-Angle Glaucoma is a condition that develops very slowly, without any symptoms at first. It gradually increases, and your vision gradually disappears. By the time you realize it, your vision may have been severely damaged. This damage cannot be reversed. That's why it's so dangerous. Treatment is mainly aimed at reducing the pressure in the eye and stopping the disease from getting worse. If left untreated, this condition can lead to blindness.

How does this affect your vision?

Open-Angle Glaucoma begins with loss of vision in the area around your visual field , called your peripheral vision . It appears as if the vision is gradually darkening on both sides and narrowing in the middle. Most people have vision in both eyes, but usually one eye is slightly worse than the other. This is why it can sometimes be difficult to recognize the disease. This is because the eye that sees slightly better compensates for the vision loss in the other eye.

What are the symptoms of Open-Angle Glaucoma?

Many people don't experience any symptoms until their vision is significantly damaged. But sometimes, you can get clues from small things like:

• When you go down a flight of stairs, you miss about one step.
• When reading a book or newspaper, some letters in words disappear.
• When driving a vehicle, it becomes difficult to read the signboards and nameplates on the road.
• In low light, for example in the evening, things are not seen clearly, and it becomes difficult to distinguish between colors.

When your eye doctor examines your eyes, they may see visual field defects like these:

• Nasal step defect : A darkening of your vision towards the nose.
• Arcuate blind spot (`(Arcuate scotoma)`): A curved dark spot at the top or bottom of the field of vision.
• Paracentral blind spot (`(Paracentral scotoma)`): A small, circular dark spot slightly closer to the center of vision.
• Temporal wedge defect : A triangular, dark area of ​​vision on the side of the ear.

As the disease progresses, you gradually develop a condition called tunnel vision , which makes you see as if you are looking through a tube.

How serious is Open-Angle Glaucoma?

Open-Angle Glaucoma is a slowly but surely progressive disease. It is serious because it can damage your vision before you even realize it. But don't worry, treatment can stop or slow down the progression of this disease. However, if left untreated, it can lead to vision loss and even blindness.

This disease is usually painless. However, some people can develop a complication called retinal venous occlusion . In that case, the eyes may hurt and vision may be lost. Treating it is also a bit complicated.

Why does this (Open-Angle Glaucoma) occur?

We are told that our eyes have a natural drainage system to drain the fluids produced by the eye. Glaucoma occurs when there is a problem with this drainage system, causing fluid to build up inside the eye. This causes pressure inside the eye to increase and damage the optic nerve.

Sometimes the problem with the drainage system is obvious, sometimes it is not. In open-angle glaucoma, the drainage angle inside the eye appears to be open and well-functioning. However, there is a resistance inside. Experts believe that the problem lies in the trabecular meshwork . This is a sponge-like tissue through which fluids drain. Most treatments target this tissue.

Primary OAG and secondary OAG

This problem is similar to what happens to the trabecular meshwork as we age. As we age, its cells decrease, its shape changes, and it stops working properly. It's as if someone has accelerated the aging process of these tissues. In most cases, no clear cause can be found. In such cases, doctors call it primary open-angle glaucoma (primary OAG).

But sometimes, this drainage system can become blocked due to another medical condition. For example, it can be blocked by swelling, protein deposits, or cell debris. This is called secondary open-angle glaucoma (`(Secondary OAG)`).

The exact cause of primary OAG is difficult to determine. Although ocular hypertension is often present, it is not always present. Sometimes, even if the pressure inside the eye is normal, there may be signs of damage to the optic nerve. The following factors may increase the risk of developing primary OAG:

• Increasing age: People over 40 years of age are at higher risk.
• Family history: If someone in your family has had glaucoma, you are more likely to develop it too.
• African genetic origin: This disease is more common in people of African descent.

How is Open-Angle Glaucoma diagnosed?

Glaucoma can be difficult to diagnose if you don't have any symptoms or notice any changes in your vision. That's why it's so important to see an eye doctor regularly for eye exams . If your doctor has your past records and eye health history, they can look for small changes and risk factors that could lead to glaucoma. They can then do further tests and diagnose the disease early.

Specialists diagnose Open-Angle Glaucoma by looking for the following factors:

• Changes in the field of vision
• Damage to the optic nerve and/or high pressure in the eye (`(IOP)`)
• An open drainage angle (`(open drainage angle)`)

The following tests are performed to check for glaucoma:

• Visual field test : A test that measures the extent of your vision, that is, how far around you can see.
• Optical coherence tomography (OCT): This can take very clear, cross-sectional images of the optic nerve and other layers inside the eye. This can help to see things like the thickness of the nerve and damage.
• Gonioscopy : A procedure that directly examines the drainage angle of the eye. This is used to determine whether the angle is open, narrowed, or blocked.
• Tonometry (`(Tonometry)`): Measurement of intraocular pressure (`(IOP)`). There are various instruments for this.

What are the best treatments for Open-Angle Glaucoma?

There are medications and various procedures available to treat open-angle glaucoma. The treatment that is best for you will depend on your condition and how your eye responds to treatment. Most treatments focus on lowering the pressure inside the eye (IOP). Even if your IOP doesn't seem high, studies have shown that lowering it can slow the progression of glaucoma. This can help preserve as much of your vision as possible.

Medications for OAG

Open-Angle Glaucoma is often treated with medication. These are usually eye drops. These either increase the amount of fluid that drains from the eye or decrease the amount of fluid that is produced. This is how the pressure is lowered. Don't worry, the fluid inside your eye (aqueous humor) is different from the tears that lubricate your eyes. So changing the level of this fluid won't make your eyes dry.

Here are some of the most commonly used medications for OAG:

• Prostaglandins : Examples: travoprost, bimatoprost, latanoprost. These are synthetic hormones that help the fluid in the eye drain through a different route (uveoscleral outflow).
• Beta-blockers : Examples include betaxolol and timolol. These are medications that are also used to treat conditions such as heart disease. They reduce the amount of fluid in the eye.
• Rho-kinase inhibitors : For example, netarsudil. These work by blocking the action of certain enzymes, which relax the trabecular meshwork inside the eye, allowing fluid to drain better.
• Carbonic anhydrase inhibitors (e.g., brinzolamide, dorzolamide). These work by blocking the action of an enzyme that makes fluid inside the eye, reducing fluid production.
• Alpha-adrenergic agonists : For example, brimonidine, apraclonidine. These drugs stimulate certain nerve receptors inside the eye, reducing the production of fluid and increasing the outflow of fluid.

Surgeries and procedures for OAG

If medications do not provide enough relief, or if you do not want to continue taking medications, your eye doctor may recommend surgery for OAG. In some cases, minimally invasive surgery (`(minimally invasive surgery)`) may be recommended as a first-line treatment to avoid using medications. There are many types of glaucoma surgery. Most procedures for open-angle glaucoma attempt to improve the drainage of fluid in the `(trabecular meshwork)`.

Some of the most common procedures for OAG are:

• Laser trabeculoplasty : This uses a laser beam to treat selected areas of your trabecular meshwork. This causes chemical changes in the tissue, allowing fluid to drain better from the eye.
• Goniotomy : This is a minimally invasive glaucoma surgery performed in an operating room. It involves removing the defective/stuck trabecular meshwork and opening up the drainage system of the eye.
• Tube shunt surgery : This involves placing a small tube-like device (a shunt) inside the eye. This bypasses the trabecular meshwork and allows fluid to drain out of the eye. Surgeons use minimally invasive techniques whenever possible.

What is the outlook for (Open-Angle Glaucoma)?

With treatment, many people can stop the progression of open-angle glaucoma, or at least slow it down. But the most important thing to remember is that vision damage that has occurred before you start treatment cannot be reversed. That's why early detection is so important. Because the symptoms are not obvious, some people don't realize they're slowly losing their vision until it's too late. Although many people don't go blind, glaucoma is the second leading cause of blindness in the world. And most glaucoma is open-angle glaucoma.

Although the reason is not clear, glaucoma affects people of African genetic origin more severely than others. African Americans, Afro-Caribbeans, and West Africans are four times more likely to develop the disease. They may develop the disease decades earlier, and are six times more likely to be diagnosed with severe vision loss. After cataracts, glaucoma (often OAG) is the leading cause of blindness among black people.

Can Open-Angle Glaucoma be prevented?

Since there is often no clear cause for open-angle glaucoma, there is no way to prevent it. However , if you recognize it early and start treatment, you can prevent some of the damage caused by the disease. The best way to do this is to see an eye doctor regularly for routine eye exams. If you are at high risk for developing OAG, your doctor may recommend more frequent exams and sometimes even preventive treatments.

How should I take care of myself while living with (Open-Angle Glaucoma)?

If you are taking medications for open-angle glaucoma, it is important to take them exactly as prescribed and to never miss a day. Unlike surgery, medications are not a long-term, one-time solution to OAG. You will need to take these medications daily, possibly for the rest of your life. If you are having any side effects from the medications, or if you feel that you are not feeling any better after stopping the medication, it may be difficult to continue using them. If your current treatment plan is not working, be sure to talk to your doctor again to discuss your options.

Open-Angle Glaucoma is the most common type of glaucoma. It develops slowly, without warning, and often without symptoms. It can cause vision loss before you even know it. Hearing this can be a shock and a bit confusing. But once you receive a diagnosis, you can start treatment. Many people manage OAG successfully with medication and/or minimally invasive surgery.

The most important things you need to remember in this article

• Open-Angle Glaucoma is a silent disease , meaning it may not show any symptoms at first.
• This can gradually damage your vision before you even realize it.
• This damage cannot be reversed , so it is best to recognize it early.
• Regular eye exams can detect this disease early and protect your eyesight.
• There is treatment! Medication or surgery can control the disease and stop further damage.
• If you have glaucoma, follow your doctor's instructions exactly. Use your medication as directed.

It's up to you to take care of your eyes. So take care of this.

` Glaucoma, Open-Angle Glaucoma, Eye Pressure, Vision Loss, Eye Diseases, Eye Exams, Glaucoma Treatment