SD OCT retinal thickness in the macula area in premature children who received laser photocoagulation of avascular retina for severe ROP
K.S. Zaichko, Post-graduate Student; S.V. Katsan, Cand Sc (Med); O.V. Ivanytska, Cand Sc (Med)
Filatov Institute of Eye Disease and Tissue Therapy of NAMS of Ukraine
Background: Immature ocular optics at birth and severe retinopathy of prematurity (ROP) may affect normal development of the retina and lead to late impairment of visual functions.
Purpose: To compare spectral-domain optical coherence tomography (SD OCT) retinal thickness in the macular area between premature children who received laser photocoagulation of avascular retina (LPCAR) and full-term children aged 4-6 years.
Materials and Methods: Twenty-five premature children (50 eyes) and 38 full-term control children (69 eyes without eye disease) aged 4-6 years received observation care at the Filatov institute between 2011 and 2017. The inclusion criterion for premature children was receiving LPCAR for severe (type 1 subthreshold, or threshold) ROP diagnosed during screening. Patients with grade 4 or 5 ROP or other ocular pathology (history of cataract, glaucoma, trauma or eye surgery) were excluded.
Results: There was a significant difference in retinal thickness in the macular area between premature and full-term children; the magnitude of the difference depended on the severity of ROP. The foveal-to-central thickness ratio was found to be increased compared to controls by at least 0.1 in 18 premature children (36 eyes, 72%) who received LPCAR (p <0.05).
Conclusion: Mean SD OCT retinal thicknesses in all macular sectors in premature children who received LPCAR for ROP were greater than in full-term children.
Keywords: retinopathy of prematurity, retinal thickness, SD OCT, smooth foveal depression
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