The Diabetic Eye Screening Wales service checks for eye problems caused by having diabetes. Eye screening looks for damage to the back of the eye (diabetic retinopathy) which can lead to permanent sight loss. Making changes to your diabetes management, or having specialist treatment can slow or reverse changes caused by diabetic retinopathy. If you have been diagnosed with diabetes, and are aged 12 or over, you will be invited to attend a screening appointment. We normally invite you every year, by sending you a letter to your home address.