Painting of Neuron from Retina of Eye:The retina is a complex, layered structure with several layers of neurons interconnected by synapses. The only neurons that are directly sensitive to light are the photoreceptor cells. These are mainly of two types: the rods and cones. Rods function mainly in...

Vector generated Image of Spherometer 10-0-10MM*0.01MM:A spherometer is an instrument for the precise measurement of the radius of a sphere. Originally, these instruments were primarily used by opticians to measure the curvature of the surface of a lens .Since the spherometer is essentially a...