There are 4 names in this directory beginning with the letter A.
Abbe value
A measure of the tendency of an eyeglass lens material to cause chromatic aberration, which is an optical distortion that causes colored halos or fringes around lights or blurred vision, especially when looking through the periphery of the lens. The lower the Abbe number, the more likely chromatic aberration will be noticeabl
Aberrometer
A device that can identify common and more obscure vision errors by measuring the way light waves travel through the eye's optical system.