密苏里州堪萨斯市一家私人诊所的眼科专家，约翰C.哈根三世（John C. Hagan, III）博士解释说，他为病人做检查时所查看的症状——你也可以在自己的眼睛中查看。
Dr. John C. Hagan, III, a ophthalmologist in private practice in Kansas City, Mo. explains what he looks for when he examines his patients - and what you can look for on your own.
糖尿病视网膜病人在视力丧失之前通常没有症状。因此，很多人忽略了推荐的每年一次的眼科检查。
People with diabetic retinopathy usually do not have symptoms until they actually start to lose vision. As a result, many skip the recommended annual eye exams.
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