Age-related macular degeneration (AMD) is often described as a single disease, but it exists in two distinct forms: dry AMD and wet AMD. While they affect the same part of the eye, their behavior, risks, and management strategies differ significantly.
Understanding the difference is essential — especially because one form can evolve into the other.
What Dry AMD Is
Dry AMD is the more common form, accounting for about 85–90% of cases. It develops gradually as waste deposits called drusen accumulate under the retina and retinal cells slowly lose function.
Vision changes tend to be subtle at first and may include:
- Blurred or dim central vision
- Reduced contrast
- Difficulty reading or recognizing faces
Dry AMD progresses slowly, often over many years.
What Wet AMD Is
Wet AMD is less common but more aggressive. It occurs when abnormal blood vessels grow beneath the retina, leaking fluid or blood and damaging retinal tissue.
Symptoms may include:
- Sudden or rapid vision distortion
- Dark or blank spots in central vision
- Straight lines appearing wavy
Wet AMD can cause permanent central vision loss if not treated promptly.
Key Differences at a Glance
- Onset: Dry AMD is gradual; wet AMD is often sudden
- Cause: Dry AMD involves degeneration; wet AMD involves abnormal blood vessels
- Risk: Wet AMD carries a higher risk of rapid vision loss
- Treatment urgency: Wet AMD requires immediate intervention
Can Dry AMD Turn Into Wet AMD?
Yes. Dry AMD can progress into wet AMD, which is why regular monitoring is critical. Early detection allows treatment to begin before irreversible damage occurs.
Management Approaches Differ
- Dry AMD: Monitoring, lifestyle management, AREDS2 supplements (when appropriate)
- Wet AMD: Anti-VEGF injections to stop abnormal vessel growth
One approach does not replace the other — each form requires a different strategy.
The Takeaway
Dry and wet AMD affect the same area of the eye but behave very differently. Knowing which form is present — and watching closely for changes — can make a meaningful difference in preserving vision.
