Anna Carlgren:
‘Glass has this wonderful ability of being able to alter things. Solely by changing the thickness of the glass different optical phenomena and optical effects occur. The piece 'World upside down' show convergence through a convex lens. The term convex denotes a surface like the outside of a ball or sphere and convergence is the bending of light rays towards each other by a convex lens. Both the lens and the window should be made of the same type of glass to ensure the same coefficient of thermal expansion.’
