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.
These are 225s, so the width is 225 millimeters, or about 8.85 inches. The next number is the aspect ratio. This is the height of the side wall expressed as a percentage of the tread width. For simple math, say you had a 225/50 tire, the sidewall would measure 50% of the section width. 50% of 225 is 112.5mm, or 4.4 inches of sidewall. The last number is the rim size.