(A) Side view of the plastic prop used to suppress phosphene perception. The props thickness measured 20mm and was wrapped in vinyl tape which was the original encasing of the 40mm figure-of-eight coils. Stemming from the base are two plastic cylinder-shaped bars that were designed to fit tightly within the holes of the coil. (B) Illustration showing the prop mounted onto the coil. The prop was designed to reflect the coils dimensions as seen from this angle.