13/05/2026
Understanding Dry vs Wet AMD: Two Different Forms of Age-Related Macular Degeneration
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Age-Related Macular Degeneration (AMD) is one of the leading causes of central vision loss in older adults worldwide. It primarily affects the macula, the central part of the retina responsible for sharp vision needed for reading, driving, facial recognition, and detailed tasks.
The image above compares the two major types of AMD: Dry AMD and Wet AMD, along with their retinal scan appearance on OCT (Optical Coherence Tomography). Understanding the difference between these two conditions is extremely important because their progression, complications, and treatments are very different.
What Is AMD?
AMD is a degenerative retinal disease that damages the macula over time. Peripheral (side) vision usually remains normal, but central vision gradually becomes blurred, distorted, or lost.
AMD mainly occurs in individuals over the age of 50 and becomes more common with aging.
Dry AMD (Non-Neovascular AMD)
Dry AMD is the most common form, accounting for nearly 85–90% of AMD cases.
In the image, the left side demonstrates characteristic findings of Dry AMD:
• Drusen
• Pigment clumping
• Geographic atrophy
What Are Drusen?
Drusen are yellow deposits of lipids and proteins that accumulate beneath the retina. Small drusen may occur naturally with aging, but larger and more numerous drusen increase the risk of AMD progression.
In OCT scans, drusen appear as elevations beneath the retinal pigment epithelium.
Pigment Clumping
Pigment changes occur due to dysfunction of retinal pigment epithelial (RPE) cells. These cells support photoreceptors and are essential for retinal metabolism.
Pigment irregularities indicate retinal stress and disease progression.
Geographic Atrophy
Advanced Dry AMD may progress to geographic atrophy, where retinal cells gradually die, causing permanent blind spots in central vision.
This stage can significantly impair reading and face recognition.
Symptoms of Dry AMD
• Gradual blurred central vision
• Difficulty reading small print
• Need for brighter lighting
• Reduced contrast sensitivity
• Trouble recognizing faces
• Slow adaptation to darkness
Dry AMD usually progresses slowly over years, but some patients may eventually develop Wet AMD.
Wet AMD (Neovascular AMD)
The right side of the image shows Wet AMD, the more aggressive and vision-threatening form.
Although less common, Wet AMD causes the majority of severe vision loss associated with AMD.
The image highlights:
• Subretinal hemorrhage
• Fluid accumulation and retinal elevation on OCT
What Happens in Wet AMD?
Abnormal blood vessels grow beneath the retina from the choroid. This process is called choroidal neovascularization (CNV).
These fragile vessels leak:
• Blood
• Fluid
• Lipids
The leakage damages retinal tissue rapidly and may cause sudden vision distortion or central blindness.
Subretinal Hemorrhage
The dark area in the retinal photograph represents bleeding beneath the retina.
This bleeding can destroy photoreceptors if not treated promptly.
OCT Findings in Wet AMD
The OCT scan demonstrates retinal swelling and fluid accumulation. OCT is one of the most important tools used in diagnosing and monitoring Wet AMD.
It helps ophthalmologists detect:
• Intraretinal fluid
• Subretinal fluid
• Pigment epithelial detachment
• Retinal thickening
Symptoms of Wet AMD
• Sudden central vision loss
• Distorted straight lines (metamorphopsia)
• Dark or blank central spots
• Rapid decline in reading vision
• Objects appearing smaller or warped
Wet AMD may progress quickly within weeks or even days.
Risk Factors for AMD
Several factors increase AMD risk:
• Increasing age
• Smoking
• Hypertension
• Family history
• Obesity
• Cardiovascular disease
• Excessive UV exposure
• Poor diet low in antioxidants
Smoking is one of the strongest modifiable risk factors and significantly increases AMD progression.
How Is AMD Diagnosed?
Modern retinal imaging plays a major role in diagnosis.
Common Diagnostic Tests
• Dilated retinal examination
• OCT (Optical Coherence Tomography)
• Fundus photography
• Fluorescein angiography
• Amsler grid testing
OCT has revolutionized AMD management because it provides high-resolution cross-sectional images of retinal layers.
Treatment Options
Dry AMD Treatment
Currently, there is no complete cure for Dry AMD, but progression may be slowed.
Management includes:
• AREDS2 nutritional supplements
• Smoking cessation
• Healthy diet rich in leafy greens and omega-3 fatty acids
• UV protection
• Regular retinal monitoring
Wet AMD Treatment
Wet AMD requires urgent treatment.
The main therapy involves anti-VEGF injections, which block abnormal blood vessel growth.
Common medications include:
• Ranibizumab
• Aflibercept
• Bevacizumab
• Faricimab
These injections can stabilize vision and sometimes improve it if treatment begins early.
Importance of Early Detection
Early diagnosis is critical in AMD management.
Patients should seek immediate ophthalmic evaluation if they notice:
• Wavy lines
• Sudden blurred central vision
• Missing areas in vision
• Distorted objects
Routine eye examinations after age 50 can help detect AMD before severe vision loss occurs.
Final Thoughts
The image clearly demonstrates the major differences between Dry and Wet AMD:
• Dry AMD is slower and associated with drusen and atrophy
• Wet AMD is aggressive and involves bleeding and fluid leakage
Both conditions affect the macula, but Wet AMD usually causes faster and more severe visual damage.
Advances in OCT imaging and anti-VEGF therapy have dramatically improved AMD diagnosis and treatment outcomes. With early detection, lifestyle modification, and proper retinal care, many patients can preserve useful vision for years.
