结晶样视网膜变性是一种罕见隐性遗传性眼底病 ,现将我科调查的一家系 4例介绍如下 :1　病历摘要　　例 1:赵×× (先证者 ) ,男 ,2 4岁。因左眼视力无明显诱因渐进性下降 1个月来我科就诊。查体 :全身检查未见明显异常。父母非近亲联姻。无夜盲史。视力 :右眼 0 .8,左眼 0 .3( Crystal-like retinal degeneration is a rare recessive hereditary fundus disease, now our family investigation of a family of 4 cases are as follows: 1 case summary 1: Zhao XX (proband), male, 24 years old. Due to the left eye vision no obvious incentive gradual decline in 1 month to our department. Physical examination: no obvious abnormalities in the whole body examination. Parents are married to non-relatives. No night blindness history. Eyesight: Right eye 0 .8, Left eye 0 .3 (