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Glaucoma

Glaucoma

Everything you need to know about living well with glaucoma

Introduction

Introduction

The following guide provides a glaucoma explanation as well as answering questions you may have such as, ‘what is glaucoma?’, ‘what causes glaucoma?’ and ‘what are the symptoms of glaucoma?’. We also explore what glaucoma treatments are available, and what it’s like for people living with glaucoma.

Remember, you are not alone, and there are many sources of glaucoma support available to you. If you are concerned about any of the symptoms of glaucoma or information you read here, please consult your GP. This guide to glaucoma is not intended to replace official medical advice.

What is glaucoma?

Around half a million people in the UK have glaucoma – a condition where part of the eye called the optic nerve becomes damaged. There are glaucoma treatments available but the condition itself is not curable. Glaucoma can cause long-term visual problems or loss of vision if it isn’t caught early enough. Glaucoma treatments work for most people, but it is important that a person continues their treatment to avoid permanent sight problems.

Glaucoma is a big problem in developing countries, where people are undiagnosed and may have little or no access to treatment, resulting in a high risk of blindness from the condition.

Glaucoma becomes more common as we grow older, and if you have a close relative with glaucoma, you may have an increased risk of developing it yourself.

Being from an African-Caribbean or East-Asian background may also increase a person’s risk of developing glaucoma, and people from these backgrounds may develop it at an earlier age, although it is not understood why this is the case.

People with diabetes are also at an increased risk of developing glaucoma.

Many people do not realise they have glaucoma symptoms for some time before they seek help. Regular eye tests by an optician are the only way to find out if glaucoma is developing, and detect it early.

Glaucoma is actually a group of related conditions and there are different types of glaucoma.

Glaucoma causes mild to severe symptoms, with the possibility of vision loss if it is not effectively controlled with glaucoma treatments.

Watch this video to find out more about glaucoma.

What causes glaucoma?

The human eye produces aqueous fluid which causes pressure in the eye, ensuring it stays in the correct shape. Too much pressure, caused by the fluid not draining correctly, may damage the optic nerve and is usually what causes glaucoma. Some people do have a specific type of glaucoma which is not caused by increased pressure, and is instead caused by optic nerve damage.

Some people are at a higher risk of developing glaucoma, as the risk increases with age and is more common in people of African, Asian and Caribbean origin. It’s also more common in people who have existing sight issues, such as being short-sighted, or who have relatives with glaucoma.

Read more about how the eye works to help your understanding of glaucoma.

Did you know
Glaucoma is a common condition that affects the eye and which may affect a person’s sight.

Types of glaucoma

different types of glaucoma.

‘Glaucoma’ is actually an umbrella term for a group of conditions that cause similar symptoms and present differently according to the amount of pressure that builds up in the eye, and the amount of damage that has been caused to the optic nerve.

The optic nerve is essential for sight, because it transports messages between the brain and the retina. There is one main type of glaucoma, and the rest are less common. The condition varies in severity depending on which of the glaucoma types a person has. Treatment options depend on which type of glaucoma a person has and the causes behind their glaucoma.

Types of glaucoma

Here are the different types of glaucoma.

Open angle glaucoma

This is the most common glaucoma type, which starts slowly and gradually damages the eye because the fluid within the eye does not drain away as it should.

Normal tension glaucoma

Occurs even if eye pressure is normal, and is caused by a damaged or weak optic nerve.

Angle closure glaucoma

This sometimes happens really quickly, or can develop very slowly. If this type of glaucoma occurs quickly, urgent medical attention is needed because it can cause permanent blindness due a sudden pressure increase which puts the cornea and iris into contact.

Secondary glaucoma

This occurs as a result of other eye conditions. Read more about secondary glaucoma.

Baby/child glaucoma

Sometimes babies can be born with glaucoma, which is rare, and some children develop glaucoma during childhood but this is often related to other health conditions. Read more about this type of congenital glaucoma.

Did you know
Glaucoma is most common in people who have a relative with the condition, people who are over 50 years old, and people from African-Caribbean or East-Asian backgrounds.
Symptoms of glaucoma

Symptoms of glaucoma

Everyone with glaucoma will experience it differently, depending on what causes glaucoma in their case and what type of glaucoma they have.

Glaucoma causes similar symptoms regardless of which type of glaucoma it is, but some types are more painful and sudden than the most common type of glaucoma, known as open angle glaucoma. This rarely has symptoms in the beginning and for quite some time. It starts to develop slowly and diagnosis can only be made during frequent checks. Glaucoma may begin in one eye but will often affect both eventually. It’s really important to have regular, yearly checks by an optometrist (at your local optician’s practice).

Generally, glaucoma symptoms:

• Affect peripheral vision first

• Happen gradually and slowly – symptoms may come on then disappear again

• Include blurred or misty vision

• Cause an aching feeling in the eyes

• Can make you see a halo shape or ring around lights

• Can cause redness

• Can make you feel sick or induce vomiting – usually when the condition has progressed

• Cause pain in the eye – usually when the condition has progressed

Angle closure glaucoma symptoms may come on much more quickly and be more painful than open angle glaucoma; the pain is likely to be much more severe.

If you think you, or someone you know, may have any symptoms of glaucoma that are listed here, you should visit an ophthalmologist for a check-up and glaucoma testing. If you have never had your eyes checked for glaucoma, you should make an appointment and have a test every two years. If you have a relative with glaucoma or you are in a higher risk group, you should have more regular testing.

Glaucoma diagnosis is usually first picked up during a routine eye test by an optometrist (optician). The standard tests for glaucoma include:

Tonometry test

Measures eye pressure with a tonometer instrument, which may involve the instrument touching the eye, or can be done without contact using small puffs of air that blow into the eye.

Gonioscopy exam

The optometrist looks into the eye to see if fluid is draining effectively.

Visual field / perimetry test

Assesses whether or not vision is affected by glaucoma damage by testing whether or not a person can see things around the edges of their vision.

Optic nerve test

Optometrist visually assesses the optic nerve with a bright light microscope by looking into the eyes.

If an optometrist suspects you have glaucoma, they will refer you to an ophthalmologist, which is a doctor that specialises in eyes. This is usually a hospital based appointment where you will have further tests and, if required, a plan of glaucoma treatment will be devised for you.

Read more about symptoms of glaucoma and diagnosis of glaucoma.

Did you know
Glaucoma has few initial symptoms, so regular eye tests are required by an optometrist to check for the condition.

Living with glaucoma

Glaucoma is not curable but glaucoma treatments can help control the condition so it does not worsen or lead to permanent sight loss.

For some people however, their glaucoma diagnosis comes too late and the condition may already be at a stage where treatments are not as effective, which may result in some permanent vision loss. Read on to find out more about how living with glaucoma may affect daily life, glaucoma treatment options, glaucoma products that may help with daily living tasks for someone who has sight loss and how to eat a healthy diet for glaucoma.

Living with glaucoma

Impact on daily living

Living with a glaucoma diagnosis will affect each person differently. Early glaucoma diagnosis can make all the difference in how effective glaucoma treatments are, and to the quality of life a person has. Many people will find that glaucoma does not limit their life and they can still do most of the things they used to.

Glaucoma may mean more time spent on hospital and optometry appointments. You may have to get used to putting drops in your eyes every day, or having more advanced treatment options such as laser treatment or, in worst cases, surgery. The latter may take time to heal and recover from and this is likely to affect daily life in lots of ways.

Some people find that their glaucoma symptoms include some visual impairment, such as difficulty seeing when the light is low or, oppositely, when it is a very bright day. These problems can often be solved by good lighting around the home, avoiding driving or walking alone in the evenings, or wearing tinted glasses or sunglasses.

Some people with more advanced glaucoma may also find they have issues with their vision that make hobbies such as reading, painting, drawing, playing sports, and so on, more difficult.

In the most severe cases, some people will experience vision issues that make it difficult for them to get around safely. For example, they may bump into things more regularly, or be put at greater risk of having a fall inside or outside the home. A number of daily tasks, such as preparing food, doing household chores, eating a meal, making drinks, using the bathroom or using the telephone, may all become difficult if a person’s glaucoma causes vision loss.

Products for glaucoma

Healthcare Pro are experts in daily living aids – these are products that are designed to make everyday tasks easier for people who have mobility difficulties, vision loss, hearing loss, or other health conditions.

Here, we list a variety of products that some people may find useful if they have vision loss as a result of glaucoma (or another eye condition).

 

 

This is not an exhaustive list, and if you are looking for products that may help you, we have a team of Occupational Therapists at Healthcare Pro who can advise you on the products that will best suit your needs. Contact them by emailing [email protected] or calling 0345 121 8111.

Treatment for glaucoma

Glaucoma treatment will depend upon which type of glaucoma a person is diagnosed with and how advanced it is.

Eye drops are commonly prescribed which have to be used up to four times a day, and these work to reduce eye pressure. If a person has glaucoma, it is really important they keep up the eye drop usage and do not miss a dose, to ensure their sight is not affected. Some people find using eye drops to be strange or uncomfortable at first, but get used to it eventually.

If eye drops do not seem to be an effective glaucoma treatment, laser treatment may be used which involves a beam of light being directed into the eye to stop fluid build-up. This may involve making more holes to drain the fluid, opening the drainage tubes or making the eye produce less fluid by removing some of the liquid-producing tissue.

Surgery is also a possible treatment option if the other two treatments are not effective. This minor operation is carried out under local anaesthetic and involves removing some of the eye drainage tubes to make fluid drain better. There are risks involved and vision can be affected for several weeks afterwards.

Glaucoma and employment

Many people with a diagnosis of glaucoma are able to work as long as their vision is good and they keep on top of their treatment. Certain people may experience some sight loss and this may affect their ability to work – read more about sight loss from glaucoma and employment.

Glaucoma diet

A healthy, balanced diet is important for everybody. Some research suggests that getting the right nutrition can help prevent glaucoma developing. Excess salt intake has been linked with glaucoma. High levels of fruit and vegetables, antioxidant foods such as green tea, foods rich in omega-3 such as oily fish and nuts, and staying hydrated are all important factors in a healthy glaucoma diet, or to help prevent glaucoma occurring.

Keeping to a healthy weight and getting regular exercise for glaucoma patients is important, as is quitting smoking, which is linked to an increased risk of glaucoma.

The NHS provide information on eating a balanced diet.

Did you know
Glaucoma is treatable if it is diagnosed early, with eye drops, laser treatment or surgery.

Support

Glaucoma is a really common condition and lots of people experience it to varying degrees. Many people manage their glaucoma well and have a full and active life, with no vision loss. This may provide some sense of comfort if you have been given a glaucoma diagnosis. Other people with glaucoma will have more severe symptoms that may affect their daily life, especially if the condition has affected their sight mildly or substantially. There are many glaucoma support networks and sources of advice available, and here we list some online communities and places you can go for more help for glaucoma.

Support

Communities

Glaucoma Support – a Facebook group for people living with glaucoma to share stories, advice and experiences

International Glaucoma Association Forum – online forum for people with glaucoma to share their experiences and talk about their situations, symptoms, treatments and vision

Resources

International Glaucoma Association – a charity that provides advice and information on all aspects of glaucoma as well as an online forum, research projects, free literature and a shop

NHS – provides official medical information on all aspects of glaucoma and related conditions

RNIB – UK charity for people experiencing sight loss or visual impairment and their families, featuring information on all eye conditions, including glaucoma, real life stories from people living with sight loss, factual information on practical issues, such as finances, and lots more support

Did you know
Sadly, some people do experience permanent vision loss due to glaucoma, but there is lots of glaucoma support available for them.

Glossary

Although we always try to explain things as simply and as clearly as possible, sometimes it’s necessary to use the correct medical terminology. Medical terms are often known for being tricky to pronounce and if you’re not an expert in the subject, they can also be a little difficult to understand. Below, we’ve put together a list of terms used on this page along with a brief explanation of what they mean to help make your understanding of glaucoma as straightforward as possible.

Liquid within the eye which is clear and watery (not related to tears) and which flows between the lens and the cornea to nourish and lubricate

A condition that is present from birth and potentially hereditary

Transmits impulses to the brain from the retina

The ability to see objects positioned at the side of the body, without moving your head or eyes

Positioned at the back of the eyeball, the retina triggers nerve impulses that pass through the optic nerve to the brain, forming a visual image

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