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In page Cerebroretinal microangiopathy with calcifications and cysts:

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The retinal changes are easily identified by ophthalmoscopy, which is performed under general anesthesia if the child is very young. The abnormal vessels are even better seen with fluorescein angiography. In advanced disease, glaucoma is diagnosed by measuring intraocular pressure and cataract by using slit lamp biomicroscopy.[citation needed]