Abstract: A system and method for delivering a payload to ocular tissue includes a solution of light-degradable nanoparticles encapsulating the payload. The solution may be introduced to the ocular tissue by way of injection or through a contact lens into which the solution is embedded. A light source delivers a beam of light to the ocular tissue at the location where the solution was introduced to initiate breakdown of the particles, releasing the payload. The light source may be a laser, LED, LCD or arc lamp emitting in the ultraviolet light range.

Abstract: A water conserving toilet tank adapter device (10) is provided for use in tank reservoirs (14) of conventional toilets (12). The adapter (10) is a retrofit device for insertion into the tank outlet (18) which effectively raises the level of the drain so as to reduce the amount of water utilized in each flushing cycle. The adapter (10) includes; an outlet tube portion (30) having an interior diameter which is less than that of the tank outlet (18); a swirl disk portion (32), having swirl grooves (46) formed on a construction slope (44) for imparting angular velocity to flush water flowing therethrough; an extension portion (34) for raising the effective drain height; and a flapper rod portion (36) for supporting a conventional ball flap valve (24). An adaptive ring (38) is provided to assure a watertight seal with angularly arrayed tank outlets (18).