These Prada Rectangular Aviator Sunglasses combine the best of the aviator sunglass style with the more protective wraparound shield style, resulting in a pair of glasses that is both stylish and practical. The lenses offer 100% UVA/UVB protection, shielding the eyes and face from the sun, but have the gradient tint that is so beloved among the wearers of aviator glasses. The lens frames are made of metal, for added stability, while the sides are plastic and bear the Prada logo. Price: $220.

I don't know about your dad, but my father never wore the most fashionable sunglasses. Of course, he did have a reasonable idea of what would look stylish and of which shape would flatter his face, but that doesn't mean he actually bought those types of glasses for himself. This is, of course, the very sort of thing that makes sunglasses such a great gift. The Lacoste Aviator Sunglasses are sleek and sporty, but not too outrageous or overly trendy - just in case your dad is a bit on the conservative side. The lenses (grey in gunmetal frames or green in silver frames) offer full UV protection. Durable but flexible metal frames can be bent slightly for a perfect fit on just about any face. Price: $148.