This is a comprehensive study of a large range of biometric and optical parameters in people with type 1 diabetes. The parameters of 74 people with type 1 diabetes and an age matched control group were assessed. Most of the people with diabetes had low levels of neuropathy, retinopathy and nephropathy. Marginal or no significant differences were found between groups for corneal shape, corneal thickness, pupil size, and pupil decentrations. Relative to the control group, the diabetes group demonstrated smaller anterior chamber depths, more curved lenses, greater lens thickness and lower lens equivalent refractive index. While the optics of diabetic eyes make them appear as older eyes than those of people of the same age without diabetes, the differences did not increase significantly with age. Age-related changes in the optics of the eyes of people with diabetes need not be accelerated if the diabetes is well controlled. U. K. 102(3), 359-363 (1982). 32. J. Cavallerano, "A review of non-retinal ocular complications of diabetes mellitus," J. Am. Optom. Assoc. 61(7), 533-543 (1990). 33. S. Moss, R. Klein, and B. Klein, "Accommodative ability in younger-onset diabetes," Arch. Ophthalmol. 105(4), 508-512 (1987). 34. M. Spafford and J. Lovasik, "Clinical evaluation of ocular and visual functions in insulin-dependent juvenile diabetics," Am. J. Optom. Physiol. Opt. 63(7), 505-519 (1986). 35. S. Yamamoto, E. Adachi-Usami, and N. Kuroda, "Accommodation power determined with transient pattern visual evoked cortical potentials in diabetes," Doc. Ophthalmol. 72(1), 31-37 (1989

Straylight, lens yellowing and ocular aberrations were assessed in a group of people with type 1 diabetes and in an age matched control group. Most of the former had low levels of neuropathy. Relative to the control group, the type 1 diabetes group demonstrated greater straylight, greater lens yellowing, and differences in some higher-order aberration co-efficients without significant increase in root-mean-square higher-order aberrations. Differences between groups did not increase significantly with age. The results are similar to the findings for ocular biometry reported previously for this group of participants, and suggest that age-related changes in the optics of the eyes of people with well-controlled diabetes need not be accelerated.