Diffuser-induced changes in refractive state and vitreous chamber depth (plotted as the interocular difference between the treated and control eye, n = 15) correlate significantly (P < 0.01). The vertical line (x = 0) separates the experimental groups. Right of line: group 1, treated eye longer and, on average, more myopic; left of line: group 2, treated eye shorter and, on average, more hyperopic.