Power point presentation about sight

I have created this ppt document to work on how we use our sense of sight.

https://docs.google.com/presentation/d/1d01YSeTI_bzghPfpjXy_LfVVT2MgsKD4oHsSNl-VmME/pub?start=true&loop=false&delayms=5000

Have a look! :)