The present invention aims to provide an emergency, flat pack, glasses kit, which is easily and quickly assemblable into glasses. The kit is compact and typically has the size of a credit card, and may thus be carried in a pocket, wallet or purse. Various types of lenses having a variety of purposes may be fitted or formed in the kit, including prescription lenses to suit the user for general use or for reading, sun-protection or safety lenses. There is thus provided, in accordance with a preferred embodiment of the present invention, a flat pack optical device kit, which includes: one or more lens frames, each having an lens disposed therein and each having one or more frame attachment means formed on the frame; one or more support arms, each having, formed at a first extremity thereof, an arm attachment means for attaching the one or more support arms to the one or more lens frames and each having an ear holder element formed at a second extremity thereof; and apparatus for supporting the one or more lens frames, and the one or more support arms in a planar arrangement, wherein the one or more lens frames and the one or more support arms are adapted for selectable disassembly from the planar arrangement, and for cooperative assembly so as to form the optical device.