Microstructural changes in the retina related to prematurity

Area of Science:

• Ophthalmology
• Neonatology
• Developmental Biology

Background:

• Premature birth can impact infant development, including ocular structures.
• Retinopathy of prematurity (ROP) is a significant concern in preterm infants.
• Understanding retinal morphology in preterm infants is crucial for long-term visual health.

Purpose of the Study:

• To evaluate retinal morphology in preterm infants using spectral-domain optical coherence tomography (SD-OCT).
• To compare retinal changes based on gestational age, presence of ROP, and comorbidities.
• To identify factors associated with retinal structural alterations in preterm neonates.

Main Methods:

• Retrospective cohort study involving preterm and term infants.
• Ophthalmologic assessments including visual acuity, refraction, and funduscopy.
• SD-OCT imaging to measure retinal layers, including retinal nerve fiber layer (RNFL) and ganglion cell-inner plexiform layer (GCL-IPL).

Main Results:

• No significant retinal differences were found in preterm infants without treated ROP compared to term infants.
• Early preterm infants with treated ROP showed altered RNFL thickness and thinner GCL-IPL.
• Low birth weight was associated with increased foveal thickness and ganglion cell damage, independent of gestational age.

Conclusions:

• Prematurity without treated ROP does not appear to disturb retinal structure.
• Severe ROP and low birth weight are linked to neuronal and axonal damage in the inner retinal layers.
• Comorbidities such as inflammation and hypoxia exacerbate detrimental effects on retinal development.