Only glass' outer surface reflects light, which makes it considerably more useful than, say, silver or tin for eyeglass lenses.
(Only glass' outer surface; reflects; light, which makes it considerably more useful than, say, silver or tin for eyeglass lenses) (light; makes; it considerably more useful than, say, silver or tin for eyeglass lenses)
Only glass' outer surface light
reflects makes
light, which makes it considerably more useful than, say, silver or tin for eyeglass lenses
it considerably more useful than, say, silver or tin for eyeglass lenses