This is an author produced version of a paper published in Diabetologia. This paper has been peer-reviewed but does not include the final publisher proof-corrections or journal pagination. Citation for the published paper: Bengtsson, B and Heijl, A and Agardh, E "Visual fields correlate better than visual acuity to severity of diabetic retinopathy." Diabetologia. 2005 Dec;48(12):2494-500. http://dx.doi.org/10.1007/s00125-005-0001-x Access to the published version may require journal subscription. Published with permission from: Springer