Table 2 Applied screening criteria and screening policy in our department

Screening criteria

Infants with GA < 32 weeks and/or BW < 1501 g

or Infants of greater GA and BW referred by the attending neonatologist due to comorbidities

Screening commencement

At 4–5 weeks postnatal age for infants with GA ≥ 27 weeks

At 30–31 weeks postmenstrual age for infants with GA < 27 weeks

Mydriasis

Combination of phenylephrine 1.67% and tropicamide 0.33%

1 drop in each eye, for 3 doses, with 5-min intervals

Fundoscopy

Binocular indirect ophthalmoscopy with 28-Diopter lens, without the use of eyelid speculum or scleral indentation, performed by the same, experienced ophthalmologist (AM).