Rop screening
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AAP AAO retinopathy of prematurity screening guidelines gestational age birth weight 2023
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Retinopathy of Prematurity (ROP) screening
Who should be screened?
Perform dilated retinal examination in:
- All infants with gestational age ≤30 weeks or birth weight <1500 g
- Selected infants born at >30 weeks with an unstable clinical course, especially those requiring cardiorespiratory support, based on neonatologist judgement.
Harriet Lane Handbook, 23rd ed., p. 665
Some current AAP material uses a slightly broader threshold of birth weight ≤1500 g or gestational age <31 weeks. Follow your local NICU or national protocol.
First examination
| Gestational age at birth | Timing of first ROP exam |
|---|---|
| ≤27 weeks | 31 weeks postmenstrual age (PMA) |
| ≥28 weeks | 4 weeks chronological age |
| <25 weeks | Consider earlier assessment at 6 weeks chronological age, depending on comorbidities and concern for aggressive posterior ROP |
Harriet Lane Handbook, 23rd ed., p. 665
How screening is done
- Dilated fundus examination by an ophthalmologist, generally using binocular indirect ophthalmoscopy.
- Documentation includes:
- Zone: I, II, or III
- Stage: 0 to 5
- Presence or absence of plus disease
- Presence of aggressive posterior ROP
Follow-up interval
The interval depends on the retinal findings:
| Finding | Typical repeat examination |
|---|---|
| Immature retina, zone I | 1 week or less |
| Immature retina, posterior zone II | 1-2 weeks |
| Immature retina, zone II without ROP | 2 weeks |
| Stage 1-2 ROP, no plus disease | Usually 1-2 weeks, determined by zone/stage |
| Type 1 ROP / treatment-requiring ROP | Urgent retinal specialist management |
When can screening stop?
Stop only when the ophthalmologist confirms one of the following:
- Retinal vascularization has reached zone III without prior significant ROP
- Full retinal vascularization is achieved
- ROP has regressed completely
- PMA is sufficiently advanced with no concerning disease, according to the examining ophthalmologist and local protocol
High-yield point
ROP risk is strongly related to prematurity and oxygen exposure. Excess oxygen can interrupt normal retinal vascular development and contribute to subsequent abnormal retinal neovascularization.
Harriet Lane Handbook, 23rd ed., p. 665
Harriet Lane Handbook, 23rd ed., p. 665
Recent reviews are evaluating telemedicine and growth-based tools such as G-ROP, but these supplement rather than automatically replace established local screening protocols. Recent evidence includes systematic reviews indexed as PMID 41951053 and 41621807.
Less than 1 kg rop screening
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Finding Sources
Searching PubMed
"retinopathy of prematurity" AND screening
Searching the Web
retinopathy prematurity screening infants birth weight less than 1000 g first examination guideline
Yes. Any baby with birth weight <1 kg (1000 g) must undergo ROP screening.
Timing of the first eye examination depends on gestational age:
- GA ≤27 weeks: at 31 weeks postmenstrual age (PMA)
- GA ≥28 weeks: at 4 weeks after birth
Continue follow-up as advised by the ophthalmologist until retinal vascularization is complete or ROP has regressed.
The Harriet Lane Handbook, 23rd ed., p. 665
The Harriet Lane Handbook, 23rd ed., p. 665
In many Indian NICU protocols, the screening eligibility threshold is broader, so always follow the unit's ROP schedule.
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