The present invention relates to aerated food products with enhanced foam stability comprising aggregated proteins in the form of mixtures of fibrils together with at least one other type or structure of aggregates such as worm-like aggregates andor spherical like aggregates. This modular keypad assembly may include a user input through which a user may operate the projection device. Before the solution is cured, circularly-polarized light is applied to the substrate to induce a magnetic field in the particles. The examiner may use the display information to conduct a refraction examination and other vision tests without the subjective response from the patient.