方法：通过B超来初步了解白内障患者的眼后段情况，如发现黄斑区回声有异常，可继续行频域OCT来进一步确诊。

结果：术前进行B超检查怀疑有黄斑病变的白内障患者178例217眼，进一步行频域OCT扫描。有213眼确诊有黄斑病变，其中湿型年龄相关性黄斑变性(AMD)70眼，黄斑前膜65眼，黄斑裂孔21眼，干型AMD 17眼，其他黄斑病变23眼，4眼频域OCT扫描显示为非黄斑区的后极部的其他病变。OCT完全扫描不到眼底的17眼，此17眼在行白内障手术后进行频域OCT检查均确诊为黄斑病变。

结论：多数白内障患者无法看清眼底，B超就成为了解眼球后段的重要检查手段。因B超操作简单价格低廉，检查范围广，对患者的配合程度要求较低，且不受屈光间质混浊的影响，所以普遍作为白内障术前的常规检查之一。当B超显示怀疑有黄斑病变时再进一步行频域OCT扫描，二者的诊断相符性极高。

METHODS: Posterior segment lesion of cataract patients can be primarily understood by B-scan ultrasound. OCT can be performed to further diagnose if there is abnormal echo in macular area.

RESULTS: A total of 178 cataract patients(217 eyes)who were suspected as macular diseases were examined by B-scan ultrasound and were scanned by OCT. A total of 213 eyes were diagnosed as maculopathy, including 70 eyes with wet age-related macular degeneration(AMD), 65 eyes with macular epiretinal membrane, 21 eyes with macular hole, 17 eyes with dry AMD and other 23 eyes with macular diseases. Results of frequency domain in 4 eyes showed that there were other lesions in the posterior pole in non-macular area. The fundus of 17 eyes can't be seen by OCT scan. These 17 eyes were diagnosed as maculopathy by SD-OCT of frequency domain after cataract operation.

CONCLUSION: B-scan ultrasound can be important detection tool to understand the posterior segment lesion since most cataract patients' ocular fundus are not clear. As B type ultrasound operation is simple, inexpensive and widely used for examination with a low degree of patients' cooperation and no influences from opacity of optical media, it is often used as routine examine method before cataract surgery. If B-scan ultrasound examination shows signs of macular diseases, SD-OCT will be taken. The results of these two methods are quite constant.