Abstract: Provided is a polymerizable composition including (a) a polymerizable component comprising a diol bis(allyl carbonate) and/or a pre-polymer thereof; and (b) a polymerization initiator component including: (i) a di(C6-C10 alkyl) peroxydicarbonate, and (ii) an organic peroxide having one peroxy, one peroxycarbonate, or one peroxybenzoate group and a 1,1-dimethylalkyl group bonded to a peroxy oxygen, where (ii) comprises a molecular weight ranging from 200 to 250 g/mole, the polymerization initiator (b) is free of diisopropyl peroxydicarbonate, (i) comprises an amount ranging from 4.87% to 7.90% by weight relative to the total solids of the polymerizable composition and (ii) comprises an amount within the range defined by the following formula: (4.406X2?0.592X+0.021)?Y?(0.726X2?0.121X+0.009) where X corresponds to the weight fraction of (i) and Y corresponds to the weight fraction of (ii). Also provided is a method of making an optical article from the polymerizable composition.

Abstract: A delivery sheath to catheter coupler includes a cylindrical shaft and a coupling member. The cylindrical shaft extends along an axis and is configured for longitudinal alignment with an insertion port of a catheter delivery sheath. The cylindrical shaft includes a proximal end, a distal end, and a lumen extending from the proximal end to the distal end along the axis. The lumen is sized to receive an end effector of a catheter. The coupling member is attached to the cylindrical shaft and is configured for selective securement to the catheter delivery sheath. The coupling member is configured to align the axis of the lumen with a longitudinal axis of the insertion port when the coupling member is selectively secured to the catheter delivery sheath.

Abstract: An umbrella that is constructed with a portion that takes the appearance of the crown of a hat and another portion which takes the appearance of the brim of a hat.