Macular Degeneration Vision Simulator

How macular degeneration can change central vision

AMD affects the macula — the small central part of the retina that gives you sharp, detailed vision for reading and faces — while your side (peripheral) vision is kept. Most AMD is the slow ‘dry’ type; a smaller number develop ‘wet’ AMD, where new distortion of straight lines can appear quickly and needs prompt treatment. Try the Amsler grid scene to see how straight lines change.

Overview

Age-related macular degeneration (AMD) affects the macula, the small central part of the retina that gives you sharp, straight-ahead vision for reading, driving and recognising faces. As the macula is damaged, the centre of what you look at can grow blurry, dim or greyed-out, and straight lines may start to look wavy or bent — a symptom called metamorphopsia. Crucially, AMD does not cause total blindness: your peripheral (side) vision is normally preserved, so most people keep enough vision to move around and stay independent, especially with low-vision tools and support. There are two main types: “dry” AMD, the more common and slower form, and “wet” AMD, in which abnormal blood vessels leak under the retina and can change vision more quickly. This simulator shows a soft fade and blur over the centre of the scene, with a gentle wavy warp — not a sharp black dot.

Symptoms of macular degeneration (amd)

• A blurry, dim or greyed-out area in the centre of your vision, while the edges stay clearer
• Straight lines — door frames, text rows, lamp posts — appearing wavy, bent or warped (metamorphopsia)
• Difficulty reading, recognising faces or seeing fine detail straight ahead
• Needing brighter light than before, and trouble adjusting from bright to dim places
• Colours sometimes appearing less vivid
• In wet AMD, a faster change in central vision or new distortion over days to weeks

What causes macular degeneration (amd)

• Aging changes in the macula, the central part of the light-sensing retina — the main driver of AMD
• Dry AMD: yellowish deposits called drusen build up under the retina and the macular cells gradually thin
• Wet AMD: abnormal new blood vessels grow under the retina and leak fluid or blood, distorting and damaging central vision
• A mix of genes and lifestyle factors (especially smoking) that affect how the macula ages

Macular degeneration (AMD) risk factors

• Age over 50, with risk rising further after 60
• Smoking, which is one of the strongest changeable risk factors
• A family history of AMD
• European (white) ancestry
• High blood pressure and heart or blood-vessel disease
• A diet low in fruit and leafy green vegetables, and obesity

Prevention & early detection

• AMD cannot be fully prevented, but you can lower your risk and help protect your vision
• Do not smoke — quitting at any age reduces risk
• Eat plenty of leafy greens, colourful vegetables and fish; keep blood pressure and weight in a healthy range
• Have regular dilated eye exams, especially after age 50 or if AMD runs in your family
• If you already have intermediate AMD, ask your eye doctor whether AREDS2 vitamin supplements are right for you
• Use an Amsler grid at home as advised, and report any new central blur or distortion promptly

Treatment

There is no cure that restores vision already lost, but treatment can often slow the disease and protect the vision you have. For dry AMD, AREDS2 nutritional supplements can reduce the chance of intermediate disease progressing to the advanced form, and a newer group of medicines for advanced dry AMD (geographic atrophy) may slow its growth. For wet AMD, regular injections of anti-VEGF medicine into the eye can stop the abnormal vessels from leaking and, in many people, stabilise or even improve central vision — which is why getting wet AMD treated early matters so much. Low-vision rehabilitation, magnifiers, brighter lighting and screen-reading tools help people make the most of their remaining vision. The right plan depends on the type and stage of AMD and is decided with your eye doctor.