That is, the parents are cousins.Through the fundus examination, we found diffuse yellowish crystal deposits and chorioretinopathy in the posterior pole. 兩病例為姐妹，眼底檢查可見散在性黃白色晶體沈著物，后極部可見脈胳膜網膜變性。
The alert of the disease combined with careful examination of indirect ophthalmoscopy and the aid of B-scan ultrasonography will achieve the correct diagnosis of the disease. 我們只要對這種疾病存有警覺性，並藉著詳盡的眼底檢查及超音波掃描，通常可有正確的診斷。
