ah , we have a lot to be grateful for in the many styles of eyeglasses in this age - for if i were to take these off , i should have to keep my head bowed , not to startle people with the mere play of yellow and brown and gold in my eyes , that have grown ever more jewel-like over the centuries , so that i seem a blind woman set with topaz for her pupils , or rather carefully formed orbs of topaz , sapphire , even aquamarine .