An test tool for optometry includes a lens holding frame and a clip. The protein named protein D is an Ig receptor for human IgD and has an apparent molecular weight of 42,000. To reduce the gas volume of the hydraulic accumulator, the winding space not occupied by the electrical winding in the coil former is filled with a further winding formed from plastic or other non-magnetic material. The structure further includes a gate surrounding a central portion of the at least one semiconductor nanowire, a source region located on a first side of the gate, and a drain region located on a second side of the gate which is opposite the first side of the gate. A video layout is disclosed which replaces traditional displays with multiple dice rolls in a novel fashion otherwise consistent with the disclosure herein.