TL;DR
Macular degeneration affects the eye. More specifically, it targets the macula, a small but critical area at the centre of the retina. The retina is the light-sensitive tissue that lines the back of the eye, and the macula is the part of it responsible for sharp, detailed central vision. When the macula is damaged, you lose the ability to see fine detail directly in front of you, while your side (peripheral) vision typically stays intact.
Where is the macula and what does it do?
To understand how macular degeneration works, it helps to know a little about the structure of the eye.
Light enters through the cornea at the front, passes through the pupil and is focused by the lens onto the retina at the back. The retina is made up of millions of light-sensitive cells called photoreceptors. These cells convert light into electrical signals, which travel along the optic nerve to the brain, where they’re processed into the images you see.
The macula sits right at the centre of the retina. It’s tiny, roughly the size of a grain of rice, but it’s packed with a dense concentration of photoreceptors called cones. These cones are what give you the ability to see colour, read text, recognise faces and pick out fine detail. The rest of the retina handles your broader peripheral vision, which is why macular degeneration affects central vision specifically while leaving your side vision largely unaffected.
At the very centre of the macula is the fovea, a small pit that provides the sharpest vision of all. When you look directly at something, you’re using your fovea. If macular degeneration damages this area, the impact on your day-to-day vision can be significant.
What actually goes wrong
Macular degeneration doesn’t affect the whole eye. The cornea, lens, iris and optic nerve all continue to function normally. The damage is concentrated in the layers of tissue at and around the macula, and what happens depends on which form of the condition you have.
Dry macular degeneration
In dry AMD, the most common form, the retinal pigment epithelium (RPE) beneath the macula begins to thin and break down over time. The RPE is a layer of cells that supports and nourishes the photoreceptors above it. As it deteriorates, small yellow deposits called drusen build up between the RPE and Bruch’s membrane, the thin barrier that separates the retina from the blood supply beneath.
In the early stages, these drusen are small and cause no symptoms. As more drusen accumulate and the RPE continues to thin, you may start to notice mild blurriness or difficulty seeing in low light. In the most advanced stage, called geographic atrophy, patches of RPE and photoreceptor cells die off completely, leaving permanent gaps in your central vision.
Wet macular degeneration
Wet AMD, or wAMD, is less common but more aggressive. It happens when abnormal blood vessels grow from the choroid (the blood vessel layer behind the retina) up through Bruch’s membrane and into the space beneath the macula. These new vessels are fragile and leak fluid and blood, which damages the delicate photoreceptor cells above.
This leaking can cause rapid and severe changes to central vision, including distortion, dark spots and blurriness. Without treatment, the leaked fluid can lead to scarring that causes permanent vision loss. Anti-VEGF injections, the standard treatment for wet AMD, work by blocking the protein that drives this abnormal blood vessel growth.
How it affects what you see
Because the macula handles central vision, the symptoms of macular degeneration are focused on what’s directly in front of you. You might notice that straight lines appear wavy or bent, that there’s a blurred or dark patch in the centre of your sight, or that colours look duller than they used to.
Tasks that rely on detailed central vision become harder. Reading, driving, watching television, cooking and recognising people’s faces can all be affected. But your peripheral vision stays intact, so you’ll still be able to see movement and shapes around the edges of your visual field. Macular degeneration doesn’t lead to total blindness.
The severity depends on the stage of the disease and whether one or both eyes are affected. If only one eye has significant damage, the other eye will compensate, and you may not notice major changes in your daily life. When both eyes are involved, the impact is greater, and low vision support becomes more important.
Does macular degeneration affect other parts of the body?
Macular degeneration is an eye condition. It doesn’t directly affect other organs. However, the risk factors that contribute to it, such as high blood pressure, smoking, obesity and poor diet, overlap with risk factors for cardiovascular disease and other systemic conditions. So while the disease itself is limited to the eye, the lifestyle factors that drive it have broader health implications.
This part provides readers with a quick overview of the content. Use this block at the There’s also a connection worth noting between AMD and overall wellbeing. Losing central vision can affect your ability to carry out everyday activities, which in turn can affect your confidence, independence and mental health. This is why early detection and ongoing support matter, not just for your eyes, but for your quality of life as a whole.
How to look after the affected area
You can’t feel the macula or check on it yourself, so regular eye exams are the only reliable way to detect macular degeneration before it starts causing symptoms. Your optician can spot drusen, pigment changes and early thinning long before you’ll notice any change in your vision.
Between appointments, monitoring your central vision with an Amsler grid at home is a useful habit. If you notice any new distortion, waviness or blank areas, contact your eye care professional promptly.
Related read: Crooked or Wavy Straight Lines in Vision: Common Causes & Guidance
Supporting your macular health with the right nutrients can also help. Lutein and zeaxanthin, two carotenoid pigments found in leafy greens and colourful vegetables, are concentrated in the macula itself, where they help filter harmful blue light and protect photoreceptor cells from oxidative damage. Zinc, vitamins C and E and omega-3 fatty acids also play supporting roles in retinal health.
