Crucigrama The sense organs: the sight.Versión en línea Guess which part of the human eye does these functions. por Paqui Velasco Garllardo 1 Membrane that protects the cornea. 2 It is the front and transparent part of the sclera. 3 Where the rods and cones are located. 4 Outer layer of the eye. 5 It opens or closes depending of the light. 6 Colourful part of the eye. 7 It changes its shape in order to to focus the image. 5 6 2 1 7