Home/Blogs/Blog details

Macular Degeneration(AMD) - Alzheimer's Of The Eye

Apr 06, 2017

Macular Degeneration(AMD) - Alzheimer's Of The Eye

Macular degeneration is a medical condition which causes blurring of vision or no vision around the center of visual field.

Risk factors for the disease include aging which is perhaps the most important predisposing cause of AMD. Family also plays an important role. Smoking increases the risk of AMD by 2-3 times. Atherosclerosis, high cholesterol, obesity are important risk factors for AMD. Chances of recurrence in siblings of an affected patient are 3- 6 times higher than in general population.

Signs and symptoms of AMD include:

  • Distortion of vision in which a straight line grid appears blank in parts and wavy. There may be shadows or missing areas in vision. This type of vision is called metamorphopsia.
  • Contrast sensitivity loss
  • Visual function recovery is slow after bright light exposure
  • Difficulty in recognizing between 2 or more dark colors and 2 or more light colors.

AMD consist of 3 stages:

Early AMD- medium sized drusen (yellow deposits of protein and lipids) which is about the width of human hair is present on macula. This stage is asymptomatic.

Intermediate AMD- in this stage there are large drusen and/or abnormal retinal pigments on macula. It is usually asymptomatic.

Late AMD- in this stage, lot of retinal damage occurs and there is loss of central vision. This stage can be further subdivided into 2 types of damage: Dry AMD and Wet AMD. Dry AMD is also known as geographic AMD or non neovascular AMD or non exudative AMD. This type of AMD comprises of 80-90% cases of AMD.  10-20% cases develop into wet AMD or neovascular AMD or exudative AMD. In this case vision is lost due to abnormal growth of blood vessels in choriocapillaris through the Bruch’s membrane. The new blood vessels which grow are fragile and lead to leakage of blood and proteins below macula which leads to irreversible damage to photoreceptors and rapid loss of vision if not treated early.

Latest research in Brigham Young University and Columbia University has shown a diet rich in antioxidants can prevent AMD.

Disclaimer: The information given in this write-up is purely for educating the reader. It is not meant to be a substitute for any advice from a medical expert.

footer pattern

All Copyrights reserve worldhealthcarenews.biz 2017.