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.
The 90 represents the aspect ratio. The aspect ratio is the height of the sidewall expressed as a percentage of the width. Thus, this tire has a side wall height of 90 percent times 130 mm or 117 mm. The next item youâll see is the rim size expressed in inches. Were this tire a radial, we would see a capital letter âRâ separating the aspect ratio and rim size. Since that is not the case here, you can be certain this is a bias-ply tire.