Abstract: An object of the present invention is to provide an order placement and acceptance management system and an order placement and acceptance management method, which is flexible and user-friendly for an order acceptant's side. The present invention comprises an order database for entirely storing the order data of an orderer in increments of order, demand processing means for receiving the attribution of the order data that is designated by the orderer via a network, retrieving means for receiving the foregoing attribution from the foregoing demand processing means and retrieving a subset of the order data having the foregoing attribution from the foregoing order database, transmission means for transmitting the subset of the foregoing retrieved order data to an order acceptant system via the network and progress managing means for managing the progress of the order in increments of order.

Abstract: The present invention provides a material for optical lenses which not only sufficiently has properties such as impact resistance and dye-affinity essential for the optical lenses but also simultaneously attains a high refractive index, a high Abbe's number and a low specific gravity, and which is photopolymerizable. The present invention further provides a lens made of a synthetic resin which is a copolymer obtained by copolymerizing a composition comprising 20 to 80% by weight of bis-2-methacryloylthioethyl sulfide represented by the following structural formula (1), 5 to 50% by weight of a bifunctional or multifunctional thiol and 0 to 75% by weight of a monomer copolymerizable with these compounds, and which has a refractive index of 1.58 or more, an Abbe's number of 35 or more and a specific gravity of 1.35 or less: CH2═C(CH3)COSCH2CH2SCH2CH2SCOC(CH3)═CH2  Structural formula (1).

Abstract: The present invention provides a material for optical lenses which not only sufficiently has properties such as impact resistance and dye-affinity essential for the optical lenses but also simultaneously attains a high refractive index, a high Abbe's number and a low specific gravity, and which is photopolymerizable.

Abstract: An object of the present invention is to provide an order placement and acceptance management system and an order placement and acceptance management method, which is flexible and user-friendly for an order acceptant's side.