Diagnostic modalities of choroidal melanoma are as follows: Direct ophthalmoscopy Indirect ophthalmoscopy A-scan ultrasound B-scan ultrasound CT scan of the brain MRI of the brain Fluorescein angiography Treatment modalities are as follows: If a tumour is less than 12mm observation If more than 12 mm enucleation Plaque brachytherapy Block resection Chemotherapy Radiotherapy Paraplanner vitrectomy Pan-retinal photocoagulation In some rare severe cases exenteration