A 3-year-old girl from Delhi presents with bilateral leukocoria and strabismus. Her father reports that the right eye has been turning inward for the past 4 months. Dilated fundoscopy reveals a creamy-white mass in the superotemporal quadrant of the right eye and a smaller lesion in the nasal periphery of the left eye. B-scan ultrasound confirms intraocular calcification in both eyes. Genetic testing reveals a heterozygous RB1 mutation. The right eye lesion is classified as Group D (IIRC) and the left eye as Group B. What is the most appropriate management strategy for this child?