Figure 6: Simulated hyperopic and myopic development (corresponding to myopic and hyperopic defocus, respectively), exported from the Matlab simulations. Frames A, B, and C show time course simulation of eye growth. For hyperopic growth (left), light entering the eye is focused in front of the retina, with increments in growth causing an increase in blur circle size and in turn a relative strengthening of the posterior sclera. The stiffer poster sclera creates a stronger force offsetting the internal ocular pressure, thus resulting in relatively reduced axial growth. In the case of myopic growth (right), the situation is reversed, where light entering the eye is focused far behind the retina, with increments of growth causing a decrease in blur circle size. This, in turn, weakens the poster sclera, resulting in less resistance to internal ocular pressure and a relative increase in axial length.