Table 1

 Criteria of low and higher risk for developing retinopathy (modified from Marmor et al3)

CriteriaLow riskHigher risk
Dosage<6.5 mg/kg>6.5 mg/kg
Duration<5 years>5 years
HabitusLean or average fatHigh fat level
Renal/liver diseaseAbsentPresent
Concomitant retinal diseaseAbsentPresent
Age<60 years>60 years