Age-related Macular Degeneration Disease

Macular Degeneration (MD) is the leading cause of blindness and severe vision loss in Australia. One in seven people over the age of 50 are affected, and the incidence increases with age, which is why the condition is widely referred to as Age-related Macular Degeneration (AMD). For many patients, understanding what age-related macular degeneration is helps clarify why central vision becomes vulnerable over time.

MD refers to a group of degenerative diseases of the retina that cause progressive, painless loss of central vision, affecting the ability to see fine detail, drive, read, and recognise faces. Macular degeneration causes vary depending on whether the condition is dry or wet, but both forms damage the macula and interrupt sharp vision.

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The Macula

The macula is the very centre of the retina. You are reading this text using your macula. It is responsible for central, detailed vision and is essential for activities such as reading, distinguishing faces, and driving. When macular health declines, macular degeneration symptoms begin to appear and can significantly disrupt everyday functioning.

What is Age-Related Macular Degeneration (MD)?

MD causes progressive damage to the macula, resulting in central vision loss. Knowing the early signs of macular degeneration allows patients to seek treatment sooner and, in some cases, helps slow progression.

Dry MD

Dry MD is caused by a build-up of retinal deposits over time. This can lead to gradual thinning of the central retina and a slow, steady decline in central vision. Common dry macular degeneration symptoms include blurred central vision, difficulty reading, and faded contrast.

Wet MD

Wet MD is characterised by the sudden growth of abnormal blood vessels under the retina. These fragile vessels leak fluid or blood, leading to a rapid decline in central vision. Wet macular degeneration symptoms often include sudden distortion, a dark central patch, or a noticeable change in reading or face recognition.

What are the Symptoms of Macular Degeneration?

Difficulty reading or performing any task needing fine vision
Distortion – straight lines appear wavy or bent
Difficulty recognising faces
Dark patches or empty spaces in the centre of vision

These overlap with what clinicians assess during a macular degeneration symptoms test, which helps track progression and detect subtle changes early.

Causes and Risk Factors

While ageing is the most significant factor, several other influences contribute to the development of macular degeneration, including:

Genetics
Smoking
Cardiovascular health
Prolonged UV exposure.

Family history also increases risk, and those with affected relatives should undergo regular eye examinations.

Because MD often develops silently, identifying conditions that accelerate retinal damage is critical for slowing progression.

How to Prevent Macular Degeneration

Lifestyle modification becomes the primary focus to prevent macular degeneration. While MD cannot be entirely prevented, several habits can reduce risk:

Quitting smoking
Wearing UV-protective eyewear
Managing blood pressure and cholesterol
Eating leafy greens and antioxidant-rich foods
Scheduling routine eye checks after age 50

These steps also support long-term macular health, particularly for individuals at genetic or environmental risk.

What treatments are available?

Treatment options depend on whether the MD is dry or wet.

For Dry MD

Dry age-related macular degeneration (AMD) now has treatment options that can help slow the condition and protect your eyesight for longer. Early stages are often managed with healthy lifestyle changes, special eye vitamins (AREDS2), UV protection and regular check-ups. In more advanced dry AMD, called geographic atrophy, new eye injections are available that can slow the damage to the retina. Vision aids and low-vision support can also make day-to-day tasks easier and help maintain independence.

For Wet MD

Laser treatment is sometimes indicated for the wet form of AMD. However, major advancements have come from anti-VEGF drugs such as Lucentis (Ranibizumab) and Avastin. These medications inhibit abnormal blood vessel growth and reduce swelling of the macula.

About 95% of patients maintain baseline vision with treatment, and 45% experience improvement. These treatments do not cure AMD but significantly reduce further deterioration.

Optimum lighting, prescription glasses, and magnifying devices also help patients maximise remaining vision.

Prognosis

AMD does not cause total blindness. Side (peripheral) vision remains intact, allowing patients to move around independently. Often, the condition first appears in one eye, while the other retains normal vision for years. Regular monitoring using a grid helps detect new distortions or changes promptly.

Frequently Asked Questions About Macular Degeneration

What causes macular degeneration?

Macular degeneration is caused by damage to the macula, usually from ageing, genetics, smoking, inflammation, and cardiovascular changes. In Dry MD, deposits called drusen build up under the retina. In Wet MD, abnormal blood vessels grow and leak. These underlying mechanisms contribute to the overall macular degeneration cause.

What are the early signs of macular degeneration?

The early signs of macular degeneration often include slight distortion, needing brighter light to read, difficulty seeing fine detail, and noticing faded colours. Many people do not realise symptoms have begun until one eye becomes noticeably weaker.

What do symptoms of macular degeneration feel like?

Common macular degeneration symptoms include blurred central vision, trouble reading, wavy lines, and a dark or empty spot in the centre of sight. These experiences vary depending on whether the condition is dry or wet.

What vision looks like with macular degeneration?

Vision may appear distorted. Straight lines may look bent, central detail can seem faded, and a dark patch may be visible at the centre of sight. Colours may lose richness. Peripheral vision remains intact.

Is macular degeneration hereditary?

Yes, genetics play a significant role. If a close family member has AMD, your own risk increases. This is why people often ask is macular degeneration hereditary, as family history is one of the strongest predictors.

Can macular degeneration be cured?

There is currently no cure. Many patients ask can macular degeneration be cured, and the answer is no — but available treatments, especially for Wet MD, can significantly slow or halt progression.

Can macular degeneration be stopped?

While it cannot be completely stopped, especially in the Dry form, early detection, lifestyle changes, and timely treatment can slow progression. Wet MD can often be stabilised with anti-VEGF injections.

How is macular degeneration diagnosed?

Diagnosis usually involves a comprehensive eye exam, retinal imaging, and optical coherence tomography (OCT). When patients ask how macular degeneration is diagnosed, doctors explain that imaging allows specialists to visualise the retina's layers and identify early changes, long before vision noticeably declines. Early detection remains essential for treatment planning and long-term protection of vision.

What is a macular degeneration symptoms test?

This refers to tools used to assess central vision changes, such as the Amsler grid, detailed symptom questionnaires, and retinal imaging. These tests help identify shifts in distortion, clarity, or central blind spots.

Check your Central Vision

To check your central vision, hold the grid below where you like to read. One eye at a time, focus on the central spot. The lines on the grid should appear straight and there should be no blank spots.

Risk Factors

People with a family history of Macular Degeneration have a 50 per cent chance of developing the disease. Smokers and former smokers are three times more likely to develop AMD. These factors also interact with genetic patterns linked to early signs of macular degeneration, making regular screening even more crucial.