Beeld van een pijl op de retina 1679

This 1679 etching by Sébastien Leclerc I, titled *Beeld van een pijl op de retina*, illustrates the optical principle of how an arrow is perceived on the retina of the eye. The image shows an arrow being reflected through the lens of the eye, with the point of the arrow appearing at the bottom of the image. The intricate lines and geometric shapes suggest the detailed analysis of the human eye’s mechanisms of vision. This scientific illustration, now held in the Rijksmuseum, exemplifies the 17th-century fascination with the workings of the human body.