Macular Degeneration
Age-related deterioration of the macula affecting central vision.
TL;DR
Age-related macular degeneration damages central vision. This is the one eye condition where a specific supplement formula has strong randomised evidence — but AREDS2 only slows progression in intermediate or advanced disease, and does not prevent early AMD.
Overview
Age-related macular degeneration (AMD) damages the macula — the central part of the retina — causing blurred or distorted central vision while peripheral sight is preserved. It is the leading cause of sight loss in people over 60 in developed countries. The dry form progresses slowly; the wet form can deteriorate within weeks and needs urgent injection treatment. The AREDS2 supplement formula (vitamin C 500 mg, vitamin E 400 IU, lutein 10 mg, zeaxanthin 2 mg, zinc 80 mg, copper 2 mg) modestly slows progression in intermediate AMD — one of the few supplement regimens with strong trial support, though it does not prevent or cure the disease.
Common Symptoms
- •Blurred or fuzzy central vision
- •Straight lines appearing wavy or bent
- •A dark or empty patch in the centre of vision
- •Difficulty recognising faces
- •Needing brighter light to read
- •Colours appearing less vivid
- •Slow adaptation when moving from bright to dim light
Common Causes
- •Age — the dominant risk factor after 50
- •Smoking, which multiplies risk two to fourfold
- •Genetic variants in CFH and ARMS2
- •Family history of AMD
- •Cardiovascular disease and hypertension
- •Low dietary intake of lutein and zeaxanthin
- •Cumulative ultraviolet and blue light exposure
Root Causes
Metabolic waste from photoreceptor turnover accumulates beneath the retinal pigment epithelium as drusen. Complement-mediated inflammation and oxidative stress then damage the RPE and photoreceptors. In dry AMD this progresses slowly to geographic atrophy. In wet AMD, VEGF-driven abnormal vessels grow through Bruch's membrane, leak and scar, causing rapid central vision loss.
How It's Diagnosed
Diagnostic Markers
- Dilated fundus examination showing drusen and pigment change
- Optical coherence tomography for retinal layers and fluid
- Amsler grid for distortion self-monitoring
- Fluorescein angiography where wet AMD is suspected
- Visual acuity testing at each review
When to See a Doctor
See an optometrist or doctor for blurred central vision, straight lines appearing wavy, or difficulty recognising faces or reading. Seek same-day urgent assessment for sudden distortion or a dark patch in central vision — wet AMD treated within days has far better outcomes.
Supplements Studied For This
Diet & Lifestyle
Suggested Pattern
A Mediterranean pattern is associated with meaningfully lower AMD progression in cohort studies. The specific nutrients that matter are lutein and zeaxanthin, which concentrate in the macula, plus omega-3 and zinc. Aim for dark leafy greens most days, oily fish twice weekly, and coloured vegetables — dietary intake and the AREDS2 formula work on the same pathways.
Eat more
- Kale, spinach and collard greens for lutein and zeaxanthin
- Egg yolks, a highly bioavailable lutein source
- Oily fish twice weekly
- Orange and yellow peppers, sweetcorn and squash
- Nuts and seeds for vitamin E
- Berries and citrus for vitamin C
Avoid
- Ultra-processed foods high in refined carbohydrate
- Excess alcohol
- High-glycaemic diets, linked to progression in cohort data
- Beta-carotene supplements if you smoke — lung cancer risk
Supporting Research
Lutein + zeaxanthin and omega-3 fatty acids for age-related macular degeneration: the Age-Related Eye Disease Study 2 (AREDS2) randomized clinical trial
Lutein and zeaxanthin supplementation and association with visual function in age-related macular degeneration
Lutein and zeaxanthin supplementation and association with visual function in age-related macular degeneration
Long-term Outcomes of Adding Lutein/Zeaxanthin and ω-3 Fatty Acids to the AREDS Supplements on Age-Related Macular Degeneration Progression: AREDS2 Report 28
Oral Antioxidant and Lutein/Zeaxanthin Supplements Slow Geographic Atrophy Progression to the Fovea in Age-Related Macular Degeneration
Frequently Asked Questions
Who It Affects
AMD affects around 200 million people worldwide and is the leading cause of irreversible vision loss in adults over 60 in high-income countries.
Prevalence rises steeply after 60, reaching roughly one in four over 75 for early changes. More common in people of European descent and in smokers.
Quick Facts
- •The AREDS2 formula slowed progression by about 25% over 5 years in intermediate AMD
- •Beta-carotene was removed from AREDS2 because it raised lung cancer risk in smokers
- •Smoking roughly doubles the risk of developing AMD
- •Wet AMD can cause significant vision loss within weeks without treatment
- •AREDS2 supplements do not benefit people with healthy eyes or early AMD
Lifestyle Tips
- •Stop smoking — the single most effective modifiable step
- •Use an Amsler grid weekly and report any change immediately
- •Wear UV-blocking sunglasses outdoors
- •Control blood pressure and cardiovascular risk factors
- •Ask your ophthalmologist whether AREDS2 is appropriate for your stage
- •Arrange low-vision rehabilitation early if central vision is affected
My Notes
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This information is for educational purposes only. Always consult a healthcare professional before starting any supplement regimen.