Summary Find your own blind spot Science content Biology: Sensing, Organ Systems (4, 5, 6) Science competencies (+ questioning + manipulation + others that are in every activity) Planning/conducting: data collection/recording (K up) Evaluating: inferring (3 up) Lessons activity is in Eyes Materials image of a spot and cross, attached below Procedure Print out the spot and cross image, or use the photo above. Cover your right eye and hold the spot and cross image at arm’s length (or put your head at arms length from the computer screen), with your nose centred between the spot and the cross. Stare at the cross, then slowly move the paper towards you/move your head towards the computer screen. Keep staring at the cross all the time; keep your nose centred; keep your eye covered. When the paper /screen is 20-30cm away from your face, the spot disappears, as the spot is over the blind spot of your left eye. This can be a tricky activity for some students - make sure you are staring at the cross the whole time. The opposite can be done: cover your left eye, and stare at the circle while moving towards the image. The cross will disappear as it moves over the blind spot of your right eye. We have a blind spot in each of our eyes where the optic nerve passes through the retina in the back of the eye. There are no light-sensitive cells in this area so it can not make images. Attached documents blind_spot_image.pdf Notes Hard for Ks and some grade 1s. Grades taught Gr K Gr 1 Gr 2
