Madame Tussauds have posted this comment on their Facebook page about making the eyes for Benedict’s waxwork
The wax figure’s eyes will be exact replicas of Benedict’s. Each pair of eyes takes approximately 10 hours to make. At the sitting, stock glass eyes were compared to the Benedict’s own, and life-size colour transparencies were taken, so that our eye-making experts can reproduce the exact inner, middle and outer iris and sclera colours. Each eye is painted with watercolours with fine red silk thread used to create the veining lines, and the whole is cast into acrylic.