| Summary: | Background: Laser therapy has been the gold standard treatment for retinopathy of prematurity (ROP), while intravitreal bevacizumab (IVB) is reported to be of significant benefit for zone I ROP. A problem with laser therapy is that it is difficult to administer in ROP patients with severely dilated tunica vasculosa lentis and poor mydriasis. However, although IVB treatment has been performed in such severe ROP cases, only 1 report has discussed its usefulness. Case 1: A male infant was born with a birth weight of 382 g at 23 weeks’ gestation. As visualization was poor and laser therapy could not be performed due to dilated tunica vasculosa lentis and poor mydriasis, IVB (0.625 mg/0.025 mL) was administered to both eyes. Following treatment, the ROP gradually improved, with regression of the dilated tunica vasculosa lentis and improvement of the mydriasis in both eyes. Case 2: A male infant was born with a birth weight of 698 g at 25 weeks’ gestation. As laser therapy could not be performed due to severely dilated tunica vasculosa lentis and poor mydriasis, IVB (0.625 mg/0.025 mL) was administered to both eyes. Following treatment, the ROP gradually improved, with regression of the dilated tunica vasculosa lentis and improvement of the mydriasis in both eyes. Conclusions: IVB is potentially more useful than laser therapy for the treatment of severe ROP with dilated tunica vasculosa lentis and poor mydriasis.
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