TABLE 1

Timing of First Eye Examination Based on Gestational Age at Birth

Gestational Age at Birth, wkAge at Initial Examination, wk
PostmenstrualChronologic
22a319
23a318
24317
25316
26315
27314
28324
29334
30344
31b354
32b364
  • Shown is a schedule for detecting prethreshold ROP with 99% confidence, usually well before any required treatment.

  • a This guideline should be considered tentative rather than evidence-based for infants with a gestational age of 22 to 23 weeks because of the small number of survivors in these gestational-age categories.

  • b If necessary.