Age-Related Macular Degeneration (AMD) is a leading cause of vision loss in people over 50. This progressive retinal disorder primarily affects the macula—the central part of the retina responsible for sharp, detailed, and color vision. Central vision gradually deteriorates, while peripheral vision remains intact, making everyday tasks like reading or driving challenging.
The macula handles 90% of the visual information your brain processes for fine details and colors. AMD results from accelerated aging of this critical area. It manifests in two main forms:
Key risk factors include advancing age and smoking, with smokers facing 2.5 times the risk. While factors like heredity, light exposure, eye color, hypertension, and obesity have been studied, current evidence does not strongly support their role.
Early AMD often develops silently, but advanced stages reveal a central blind spot (scotoma). Key warning signs include:
If you notice any of these, consult an ophthalmologist promptly. Diagnosis involves a comprehensive eye exam, retinal imaging via angiography, and optical coherence tomography (OCT) to assess retinal layers. At home, the Amsler grid test can help detect early distortions—perform it for each eye separately.
Subtle initial symptoms make early detection crucial after age 50. Timely screening enables prompt intervention, vision-preserving strategies, and training to maximize peripheral vision use.
Wet AMD responds to anti-VEGF injections, administered several times yearly to inhibit abnormal vessel growth. Photodynamic therapy uses a "cold laser" after intravenous dye injection to slow vessel proliferation. Dry AMD currently lacks curative treatments. For advanced cases, low-vision rehabilitation is vital: orthoptists train eye movement techniques, occupational therapists adapt living spaces, and mobility instructors teach safe navigation with impaired central vision.
