Age-related loss of vision affects many people's lives, yet most tend to overlook these changes or accept them as natural. Macular degeneration, also known as AMD (age-related macular degeneration), is one of the most common eye diseases causing severe sight loss in the developed world, and it mainly affects people over 50. The disease affects the central, most densely sensitive area of the retina, the macula, which is responsible for sharp, detailed and colour vision. When this area is damaged, the person's quality of life can deteriorate dramatically. Difficulty reading, trouble recognising faces and blurring of details are all consequences of this destructive process. Because the disease develops almost unnoticed at first, early detection and timely eye examinations are crucial for preserving sight.
This article gives a comprehensive overview of the symptoms, types and treatment options for age-related macular degeneration. We cover the differences between dry and wet macular degeneration, the early signs of the disease, such as distorted vision and a dark spot, and the Amsler grid test you can do at home. You will find out when to see a doctor without delay and which lifestyle steps can reduce the risk of the disease. The aim is for everyone to know what to look out for and why eye check-ups should not be put off.
What is the macula and why is it so important?
The macula is an area roughly 5 mm in diameter in the centre of the retina, responsible for the central part of the visual field. It is what allows us to read, drive, recognise faces and do anything that requires sharp, detailed vision. The macula contains the highest density of cone photoreceptors, the cells responsible for daylight and colour vision. If the macula is damaged, a person does not lose their sight completely, but central vision deteriorates severely. Peripheral vision is usually preserved, which means the person can still detect movement, but reading, watching TV or recognising faces becomes extremely difficult.
Macular degeneration can develop slowly over years or, in some cases, surprisingly quickly. That is why it is not enough to have your eyes examined only once you have severe symptoms. Regular preventive eye screening is essential for everyone over 50.
Interestingly, although the macula is an area of just a few millimetres, it takes up almost half of the visual cortex's processing capacity. This means the brain devotes a large share of its visual resources to serving a single tiny area of the retina. When this area is damaged, the person may notice a change not only in the quality of their vision but also in their cognitive load. The brain has to work much harder to piece together a visual image from the remaining peripheral vision. This partly explains why people with macular degeneration tire more quickly when reading or using a screen, even if the loss of vision itself does not seem severe.
Dry vs. wet macular degeneration
AMD can occur in two fundamentally different forms:
- dry (atrophic)
- and wet (exudative or neovascular).
There are important differences between the two in terms of progression, symptoms and treatment.
Dry macular degeneration
Dry macular degeneration is the most common form of AMD. The innermost layer of the retina is lined by a thin layer of cells, the retinal pigment epithelium, whose job is to nourish the light-sensing cells and and az remove metabolic waste. Think of it as a cleaner constantly clearing away the "waste" produced in the eye. As this system slows down with age, tiny yellowish deposits build up under the macula. These are called drusen. Drusen alone do not cause visual problems, and many people are unaware of them for years; at this stage, only an eye examination can detect them.
The problem starts when the drusen multiply and the pigment epithelium cells gradually die. As more and more cells stop working, the macula can form a sharp, detailed image over an ever smaller area. This process is extremely slow. In many cases, the loss of vision becomes noticeable only over years or even decades, and at first the person may believe it is just the natural decline in vision that comes with age.
Unfortunately, there is currently no treatment that can completely stop or reverse dry AMD. However, at certain stages, dietary supplements based on the AREDS2 formula, which contain
- vitamins C and E,
- luteint,
- zeaxantint,
- cinket
- and copper,
have been shown to slow the progression of the disease. However, these should not be taken on your own initiative but always on medical advice, as they are not appropriate in every case or at every stage.
Wet macular degeneration
Wet macular degeneration is less common than the dry form, but much more aggressive and dangerous. In a healthy eye, there are no blood vessels under the retina, and for good reason: the macula needs light to reach the light-sensing cells unobstructed. In wet AMD, however, a substance called VEGF triggers an abnormal process. In the area beneath the macula, new, abnormal blood vessels start to grow. You can think of these vessels as badly built pipes: their walls are
- thin
- and fragile,
- and they easily leak fluid or even blood between the layers of the retina.
This is what makes wet AMD so serious. The leaking fluid and blood literally lift and distort the retina, which can cause rapid, dramatic loss of vision within days or weeks. It is therefore no surprise that this type is responsible for a large proportion of cases of severe, permanent sight loss.
The good news is that wet AMD can now be treated. Anti-VEGF medicines block exactly the process that triggers the growth of abnormal blood vessels. They are injected directly into the eye at regular intervals. It may sound frightening, but the procedure is quick and most patients tolerate it well. If treatment starts in time, the loss of vision can not only be stopped but in some cases vision may even improve. That is why every day counts with wet AMD. The sooner you see a specialist, the better your chances of preserving your sight.
Early signs of macular degeneration
The symptoms of AMD vary depending on the type and stage. In the early stages, there are often no noticeable symptoms at all, which is one reason why regular screening is so important. When symptoms do appear, look out for the following.
Distorted vision (metamorphopsia)
One of the most typical early symptoms is the distortion of straight lines. Things that used to look straight (such as the edge of a door frame, the outline of a building or the lines of a book) may look wavy or bent. This phenomenon, medically called metamorphopsia, indicates that the surface of the macula is no longer completely smooth because fluid or tissue changes are distorting it. If you notice this kind of distortion, see an ophthalmologist immediately.
A dark spot (scotoma) in the visual field
Another characteristic symptom is a dark, grey or blurred spot in the centre of the visual field. It can feel as if something is covering the middle of your vision. You cannot see the centre of a face clearly, but the image around the edges remains. At first the spot may be very small, almost unnoticeable, but it grows as the disease progresses. Difficulty reading with macular degeneration is partly due to this dark spot. Because the eye automatically focuses on the middle of the text, which is exactly where the missing area falls, some letters or words simply disappear from the line, as if someone had cut them out.
Difficulty reading due to macular degeneration
Reading is one of the first activities that macular degeneration makes difficult. You may notice that you need ever larger print, that the text jumps around or looks blurred, or that some words drop out of view. This can be particularly frustrating for people who used to read a lot and led an active intellectual life. With macular degeneration, difficulty reading is not just an inconvenience but a warning sign that warrants an immediate eye examination.
Other warning signs
Besides the above, other symptoms may occur:
- colours fading or looking distorted,
- reduced contrast sensitivity (difficulty finding your way in darker rooms),
- recognising faces becoming harder, even up close,
- and an unusually rapid change in your glasses prescription.
If any of these persist, you should book an eye examination without delay.
The Amsler grid test: checking yourself at home
The Amsler grid test is a simple and effective way to check how your macula is working, and you can do it at home. It was developed by the Swiss ophthalmologist Marc Amsler in the 1940s and remains one of the most reliable tools for monitoring AMD that is available to everyone.
For the test you need an Amsler grid, which consists of a 10×10 cm square grid with a small black dot in the centre. The grid can easily be downloaded from the internet and printed. Here is how to do the test. In a well-lit place, hold the grid at eye level about 30 cm away. If you wear glasses for reading, wear them for the test too. Cover one eye and focus on the dot in the centre of the grid with the open eye. Notice whether the lines of the grid look straight and completely intact. Then repeat the test with the other eye.
If the lines look wavy or distorted, if some areas look blurred or darker, or if parts of the grid are simply missing, you need an immediate eye examination. Of course, the Amsler grid test done at home is no substitute for a specialist examination, but it is an excellent way to notice changes in time. It is recommended once a week, especially for people already diagnosed with AMD.
It is important to note that the Amsler grid test cannot detect the early stage of AMD, when there are no symptoms yet. At that stage, only an instrument-based examination by an ophthalmologist can detect changes in the retina.
When should you see a doctor immediately?
One of the biggest dangers with AMD is that many people put off seeing a specialist for too long. Because symptoms may be mild at first and one eye can compensate for the other, the problem is sometimes noticed only once severe sight loss has already occurred. Remember that with wet macular degeneration, vision can deteriorate dramatically within days or weeks, so act without delay if you notice any suspicious symptoms.
See an ophthalmologist immediately if:
- straight lines suddenly look wavy or distorted,
- a dark or blurred spot appears in the centre of your vision,
- reading suddenly becomes difficult,
- when you cover one eye, the vision in the other seems noticeably weaker,
- you notice distortion or gaps on the Amsler grid.
For people already diagnosed with AMD, regular eye check-ups are particularly important. With dry AMD, one or two examinations a year are usually enough, but if you notice any change, do not wait for your next scheduled appointment; see an ophthalmologist as soon as possible. During treatment for wet AMD, check-ups are even more frequent, so that the effectiveness of treatment can be monitored continuously.
Over the age of 50, eye screening at least every two years is recommended even if you have no symptoms. If a close relative has had macular degeneration, the risk is significantly higher, so annual screening is advised.
Risk factors and prevention
Many factors play a role in the development of macular degeneration; some cannot be changed, but others can. The risk factors that cannot be changed include the following.
- Age is one of the strongest risk factors. Macular degeneration mainly occurs after the age of 50, and the risk rises sharply after 75. This does not mean that ageing automatically leads to macular degeneration, but the older you are, the more important regular screening becomes.
- A genetikai hajlam also plays a decisive role. Certain variants of the CFH and ARMS2/HTRA1 genes in particular can significantly increase the risk, so if a first-degree relative has had AMD, you should tell your doctor.
- Fair skin is statistically associated with a higher risk of AMD than in other ethnic groups. This is probably due to genetic and pigmentation differences, although the exact mechanism is not yet fully understood.
- Blue or green eyes are also considered a risk factor, as lighter eyes contain less protective pigment. This means the retina is less protected against harmful light, which can contribute to damage to the macula in the long term.
These cannot be changed, but it is important to be aware of them, as they determine who may be at higher risk.
The most important risk factor that can be changed is Smoking. Smokers are two to three times more likely to develop AMD than non-smokers. Several mechanisms are involved. Toxic substances in cigarette smoke narrow the blood vessels, reducing the blood supply to the retina, while increasing oxidative stress, the process in which free radicals damage cells, including the sensitive cells of the macula. Smoking also lowers the body's levels of lutein and zeaxanthin, the very pigments that naturally protect the macula against light damage. The risk falls gradually after quitting, but unfortunately never quite reaches the level of people who have never smoked. This also shows that prevention is far more effective here than correcting things later.
The Obesity, high blood pressure and untreated cardiovascular disease also increase the risk of macular degeneration. This is because all of these conditions damage the blood vessels and circulation, and the retina is extremely dependent on a constant, adequate blood supply. If the blood vessels
- narrow
- or harden,
- or blood pressure stays high,
the cells of the macula receive fewer nutrients and less oxygen, which can speed up the degeneration process. Regular blood sugar checks are also important, as diabetes itself can cause many eye problems.
Prolonged exposure to strong UV radiation can also harm the retina. Ultraviolet rays from the sun penetrate deep into the eye and can cause oxidative damage to the retina, especially in the macula, slowly but steadily harming its sensitive cells. This is especially true for people who spend a lot of time in strong sunshine without wearing proper UV-filtering sunglasses.
For prevention and to slow the disease, the following lifestyle measures are recommended::
- stopping smoking,
- regular exercise,
- a balanced diet rich in vegetables and fruit (especially leafy greens rich in lutein and zeaxanthin, such as spinach or kale),
- eating fish and omega-3 fatty acids regularly,
- wearing UV-filtering sunglasses in strong sunshine,
- regular checks of blood pressure and blood sugar,
- and, at certain stages, taking AREDS2-formula supplements on medical advice.
Diagnosis and treatment options
Diagnosing macular degeneration involves an eye examination in several steps. As part of the basic examination, the ophthalmologist performs a grid test, measures visual acuity and examines the back of the eye, usually through a dilated pupil. The most important diagnostic tool is optical coherence tomography (OCT), which produces cross-sectional images of the retina and can detect fluid build-up, drusen and tissue damage with great precision.
For dry AMD, there is as yet no cure that can reverse the process. The focus is on slowing it down, monitoring it and preserving quality of life. Visual aids, magnifiers, good lighting and special glasses can help a great deal in everyday life.
The cornerstone of wet AMD treatment is anti-VEGF therapy. These medicines are injected directly into the eye (intravitreal injection), usually every 4–8 weeks depending on the patient's condition. The aim of treatment is to stop the abnormal vessels from growing furtherand help the fluid that has built up in the retina to be absorbed, stabilising or even improving vision. These medicines have been a major breakthrough in the treatment of wet AMD. In many patients, not only has the deterioration been stopped, but vision has also improved. However, it is important to know that this is not a one-off treatment. It requires a long-term commitment, with regular injections and check-ups, often for years.
Photodynamic therapy (PDT) is rarely used but may be considered in certain cases: a light-sensitive drug is introduced into the bloodstream and then activated with a laser to close off the abnormal vessels.
The impact of macular degeneration on quality of life
Macular degeneration changes not only vision but quality of life as a whole. Reading, driving, watching TV and recognising faces may all become limited. This can lead to depression, social isolation and loss of independence. It is important for patients and their families to know that a diagnosis of macular degeneration does not mean immediate total blindness. Peripheral vision is usually preserved, and with the right support, quality of life can be maintained.
Rehabilitation options
The aim of vision rehabilitation is to make the best possible use of remaining sight. Special magnifiers, electronic aids such as video magnifiers, text-to-speech software, bright lighting and high-contrast surfaces can help a great deal with everyday tasks. Occupational therapists and vision rehabilitation specialists can give personalised advice.
In Hungary, modern diagnosis and treatment of AMD is available at many eye centres. Anti-VEGF treatments are funded by the national health insurance under certain conditions, so your doctor can give you detailed information about funding options and the referral system.
Don't put off your eye examination!
Age-related macular degeneration is a progressive, age-related eye disease that damages central vision. Dry and wet macular degeneration differ in their course and treatment, but early detection is crucial for both. The most important early signs, such as
- distorted vision,
- a dark spot
- and difficulty reading,
must not be ignored. The Amsler grid test can be done regularly at home and is a useful way to spot changes in time.
Today, AMD no longer necessarily means severe, inevitable sight loss, especially if treatment starts in time. Anti-VEGF therapies have revolutionised the treatment of wet AMD, and research into the dry form is also producing more and more promising results. The most important things are to have regular eye screening after 50, to consciously reduce lifestyle risk factors, and not to put off seeing a specialist at even the slightest suspicious symptom.
Protecting your eyes is a long-term investment in your quality of life, your independence and your everyday enjoyment. Anyone can be affected, but awareness and timely action make a big difference.
Frequently asked questions
Does macular degeneration cause blindness?
Macular degeneration does not cause total blindness, as it only affects central vision; peripheral (side) vision is preserved. You will still be able to find your way around, but sharp, detailed vision can become very difficult.
Is macular degeneration hereditary?
Genetic predisposition does play a role in the development of AMD, so if macular degeneration runs in your family, your risk is higher. However, this does not mean that anyone with an affected relative will definitely develop it, only that it is worth paying extra attention to regular eye screening.
Can I drive with macular degeneration?
This depends largely on the stage of the disease. In the early stages, many people can continue to drive, but in advanced cases the loss of central vision can be a serious danger. Fitness to drive should always be assessed by an ophthalmologist; do not make this decision alone, and be sure to consult a specialist.
If you feel your vision has changed, do not wait for your next routine check-up. Get in touch with us, book an appointment and make sure your eyes are healthy with the help of the best specialists!
