"Illusions d'optique." . . "Optical illusions." . . "Anamorphose (art)." . . "Anamorphose (art)" . "Proportions (art)." . . "Proportions (art)" . "Plastik." . . . . . . . . . . . . . . "Criticism, interpretation, etc"@en . "Criticism, interpretation, etc" . . . . . "Optical Corrections in the Sculpture of Donatello" . . . "Optical corrections in the sculpture of Donatello" . "Optical corrections in the sculpture of Donatello"@en . . . . . . "Visual perception." . . . .