患者男,20岁。因自幼双眼视力不佳就诊。患者自幼聋哑,其他全身检查未发现异常。患者系足月生产,其母妊娠期间无异常。父母非近亲结婚,患者妹妹及家族其他成员无同样疾病发生。眼部检查:视力右眼0.1,左眼0.3,均不能矫正。左眼轻微外斜。双眼屈光间质清晰,视盘边界清楚,颜色及大 Patient male, 20 years old. Because of poor eyesight since childhood treatment. Patients with deaf and dumb since childhood, other general examination found no abnormalities. The patient was born on term and had no abnormalities during her pregnancy. Parents of non-relatives get married, sister and other members of the family members of the same disease did not happen. Eye examination: Right eye 0.1, left eye 0.3, can not be corrected. Slight left eye diagonal. Eyes clear refractive quality, clear disc boundary, color and large