The objective of this study is to clarify the current diabetic status, including development of complications, in a nationwide cohort of type 1 diabetics, who were last examined together in a large study in 1995. These youngsters were originally participating in a nationwide study of children with type 1 diabetes in Denmark back in 1986. The investigators will try to establish risk factors for developing diabetic retinopathy. The investigators will have emphasis on retinal vessel geometry and the possibilities for early detection of reversible retinal changes, and prediction of other vascular complications.

Inclusion Criteria:

• Participation in the follow-up study in 1995

Exclusion Criteria:

• No retinal photographs from 1995

This study includes a cohort of type 1 diabetic patients, who originally were identified in 21 paediatric departments and studied in 1986. This group initially consisted of 1033 children and was estimated to involve around 80 percent of all Danish type 1 diabetic patients below the age of 18. In 1995 further examinations were performed on the cohort; this time 339 chose to participate.

In this study we will invite the participants from 1995 who also participated in the eye examinations, n=324, to participate in yet another follow-up examination.