An object of the present invention is to provide an imprinting curable composition which includes a silicon-containing polymerizable compound such as polysiloxane, exhibits outstanding adhesion to a substrate and excellent demoldability from a fine pattern mold, and causes very little mold contamination. The object is attained by providing a photo-imprinting curable composition including a polymerizable compound (A) containing a silicon atom in the molecule, a photopolymerization initiator (B) and an additive (C), the additive (C) being a compound represented by the following formula (C1) or (C2):

R.sup.1OC.sub.2H.sub.4O.sub.nX.sup.1(C1)

X.sup.2OC.sub.2H.sub.4O.sub.pC.sub.3H.sub.6O.sub.qC.sub.2H.sub.4O.sub.rX.sup.3(C2)

(In the formula (C1), R.sup.1 is a C.sub.12-30 alkyl group, X.sup.1 is a hydrogen atom or an acyl group, and n is an integer of 0 to 50. In the formula (C2), X.sup.2 and X.sup.3 are each independently a hydrogen atom or an acyl group, and p, q and r are each independently an integer of 1 to 50.)

An object of the present invention is to provide an imprinting curable composition which includes a silicon-containing polymerizable compound such as polysiloxane, exhibits outstanding adhesion to a substrate and excellent demoldability from a fine pattern mold, and causes very little mold contamination. The object is attained by providing a photo-imprinting curable composition including a polymerizable compound (A) containing a silicon atom in the molecule, a photopolymerization initiator (B) and an additive (C), the additive (C) being a compound represented by the following formula (C1) or (C2):

R.sup.1OC.sub.2H.sub.4O.sub.nX.sup.1(C1)

X.sup.2OC.sub.2H.sub.4O.sub.pC.sub.3H.sub.6O.sub.qC.sub.2H.sub.4O.sub.rX.sup.3(C2)

(In the formula (C1), R.sup.1 is a C.sub.12-30 alkyl group, X.sup.1 is a hydrogen atom or an acyl group, and n is an integer of 0 to 50. In the formula (C2), X.sup.2 and X.sup.3 are each independently a hydrogen atom or an acyl group, and p, q and r are each independently an integer of 1 to 50.)

Disclosed are ophthalmic devices formed by a process comprising: (a) providing a reactive composition containing: (i) a polymerization initiator that is capable, upon a first activation, of forming two or more free radical groups, at least one of which is further activatable by subsequent activation; (ii) one or more ethylenically unsaturated compounds; and (iii) a crosslinker; (b) subjecting the reactive composition to a first activation step such that the reactive composition polymerizes therein to form a crosslinked substrate network containing a covalently bound activatable free radical initiator; (c) deactivating at least a portion of the covalently bound activatable free radical initiator at one or more selective regions of the crosslinked substrate network such that the crosslinked substrate network contains retained covalently bound activatable free radical initiator outside of the one or more selective regions and optionally within the one or more selective regions; (d) contacting the crosslinked substrate network with a grafting composition containing one or more ethylenically unsaturated compounds, wherein the contacting is conducted under conditions such that the grafting composition penetrates into the crosslinked substrate network; and (e) activating the retained covalently bound activatable free radical initiator such that the grafting composition polymerizes with the crosslinked substrate network, thereby forming grafted polymeric networks, outside of the selective regions and optionally partially within the selective regions.