Age-related Macular Degeneration

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What is Age-Related Macular Degeneration(ARMD)?

ARMD is a condition that causes the deterioration of the macula, the small central portion of the retina responsible for sharp, straight-ahead vision.

 

Dry ARMD

Wet ARMD

Description
  • Gradual thinning of the macula.
  • Formation of drusen (small clumps of protein) under retina.
  • Caused by abnormal blood vessels growing under the retina and macula, which leak blood and fluid, causing rapid damage to the macula.
Prevalence
  • 80 - 90% of all ARMD cases
  • 10 - 20% of all ARMD cases
Progression
  • Slow, gradual vision loss
  • Rapid, severe vision loss

 

Risk Factors

  • Age (more common in people over 50)
  • Family history of ARMD
  • Smoking
  • High blood pressure
  • Obesity
  • High-fat diet
  • Prolonged sun exposure

Symptoms

  • Blurred or distorted central vision
  • Difficulty recognizing faces
  • Straight lines appearing wavy
  • A dark or empty area in the center of vision
Age-related Macular Degeneration

Amsler Grid Test

To use the Amsler grid, follow these steps once a day, every day:

  • Wear your reading glasses if you use them. Hold the grid 12 to 15 inches away.
  • Cover one eye.
  • With the uncovered eye, look directly at the center dot and keep your focus on it.
  • While focusing on the center dot, check if the surrounding grid lines appear straight or if any areas look blurry, wavy, dark, or blank.
  • Repeat the same steps with the other eye.

For someone with AMD, an Amsler grid may appear to have wavy lines or blank spots.

Age-related Macular Degeneration

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