Recent progress on computer technologies is focused on mobility and size reduction rather than functionality. That provided us researchers and commercial manufacturers with low-cost, compact and high-capability electronic hardware. Visual sensors are no exception. Hereby in the light of recent technological advance it is possible to organize sensors with a two dimension array hierarchy and build very-capable systems which are not enormous. These systems can be used and is being used in variety of needs like surveillance, virtual environment applications and robotic vision. Nature is a step ahead of us in this subject.