A diabetic with proliferative retinopathy may be at risk for severe vision loss if certain high risk characteristics (HRC) are left untreated.


Patient selection: diabetic with proliferative retinopathy


Outcome: severe vision loss (visual acuity < 25/200)


High risk characteristics:

(1) NVD (new vessels on the optical disk or within 1 disk diameter) covering > 25% of the optic disk area

(2) NVD of any size AND (preretinal hemorrhage OR vitreous hemorrhage)

(3) NVE (new vessels elsewhere, i.e. not on the optic disk) occupying a cumulative area >= 50% of the optic disk area AND (preretinal hemorrhage OR vitreous hemorrhage)



• In Klein et al the area for NVE is based on a single photographic field.


A patient with one or more high risk characteristics should undergo photocoagulation therapy if vision is to be preserved.


To read more or access our algorithms and calculators, please log in or register.