As part of their informed consent, all participants will be asked as part of their informed consent to allow study staff to contact their local ophthalmologist for their eye exam results following a positive or inconclusive portable retinal screening. Participants or their guardians will also be asked to fill out a study questionnaire during the screening visit. When available, the study subjects' medical record will be accessed to identify their BMI, time since T1D diagnosis, previous hemoglobin A1c (HbA1c) levels over the last 12 months (or longer if available), insulin regimen, Tanner staging, serum lipids, urine microalbumin:creatinine, presence or absence of hypertension, and previous diagnoses of diabetic retinopathy, microalbuminuria, hyperlipidemia or hypertension.