Disclosed is a laboratory animal retaining appliance for laboratory animal retention. More particularly it relates to optical components and method of preparing same from hydrophobic acrylic monomer that exhibit reduced or eliminated glistenings when implanted in a patient’s eye. Sequences of tags are generated by assigning tags to the components. On the circuitboard strips there are arranged a multitude of LEDs in series behind one another. The receptacle includes a pair of spaced-apart ends that connect the flanges of the receptacle to the outer wall member of the receptacle. The engagement pin is engageable with the blade hole to fix the blade to the plunger when the blade end is inserted into the slit.