Macular Degeneration

What is macular degeneration?

Macular degeneration, commonly referred to as age-related macular degeneration (AMD), is a condition that primarily affects the macula—the central part of the retina responsible for sharp, detailed vision. Think of the macula as the sensor in a digital camera that allows for clear, precise images. AMD impairs central vision, making it difficult to perform tasks such as reading, recognizing faces, and driving. It is the leading cause of legal blindness in individuals over 55 in the United States, affecting more than 1.75 million people annually.

Types of macular degeneration

Dry Macular Degeneration (Dry AMD)
Dry AMD is the most common form of the disease, accounting for about 85-90% of all cases. It occurs when cells in the macula gradually break down, leading to a slow and progressive loss of central vision. The buildup of yellowish-white deposits known as drusen can be detected during an eye exam. Patients may experience blurring or difficulty recognizing faces and reading. Although vision loss is slower in this form, regular monitoring is crucial to manage the condition effectively.

Wet Macular Degeneration (Wet AMD)
Wet AMD, though less common, is far more severe. It occurs when abnormal blood vessels grow under the retina. These vessels leak fluid and blood, leading to rapid vision deterioration, often beginning in one eye before affecting the other. Wet AMD accounts for only 10-15% of cases, but it is responsible for over two-thirds of cases with significant vision loss. Early detection is essential, as new treatments, including anti-VEGF injections, have significantly improved the outlook for wet AMD, helping to slow progression and preserve vision.

Risk factors for AMD

Several risk factors contribute to the development of both dry and wet macular degeneration.

• Age is the most significant, with individuals over 55 at the highest risk.
• Genetics also play a major role, as those with a family history of AMD are more likely to develop the condition.
• Smoking significantly increases the risk for both types, doubling the likelihood of developing dry AMD and accelerating the progression to wet AMD.
• Obesity and a poor diet low in antioxidants can worsen dry AMD.
• High blood pressure and cardiovascular disease are linked to wet AMD, as they contribute to abnormal blood vessel growth under the retina, increasing the risk of vision loss from wet AMD.

Regular eye exams and lifestyle changes, such as quitting smoking and maintaining a healthy diet, are essential for reducing these risks and preserving vision.

Advanced diagnosis and treatments

The ophthalmologists at Iowa Eye Center specialize in the diagnosis and management of both dry and wet macular degeneration, using state-of-the-art technology to detect AMD in its early stages.

While there is currently no cure for macular degeneration, treatment options can slow the progression of the disease. For wet AMD, we offer injections that can help prevent further damage. For dry AMD, lifestyle changes such as maintaining a healthy diet rich in antioxidants, regular monitoring can help manage the condition.