Noun. 1. age-related macular degeneration-macular degeneration that is age-related. AMD. macular degeneration-eye disease caused by degeneration of the cells of the macula lutea and results in blurred vision; can cause blindness.
What do the numbers on a tire mean? The DOT number appears on the sidewall of all tires intended for sales in the U.S., and designates the location of manufacture, the week and year of production, and the specific tire.
Aspect Ratio. This identifies the tireâs aspect ratio, which is the relationship of the tireâs sidewall height to the tireâs width. In this example, the sidewall height of the tire is 55% of its width. The lower the ratio, the smaller the sidewall height, which means better cornering, but a rougher ride.