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.
Here's each number and letter in order, as well as what it represents. A more detailed explanation of each characteristic is below. 255 - This is the tire's width in millimeters. 45 - This is the tire's sidewall height, expressed as a percentage of the width figure, also known as an aspect ratio. R - This is the tire's type of construction, and is almost always an R. 15 - This is the wheel diameter the tire is designed for, listed in inches.