例 1　先证者 (图 1Ⅲ ) ,男 ,2 0岁 ,大学生。因左眼视力下降 2月余于 1 999年 7月 8日就诊。患者自诉于 2月前高考之后感左眼视力下降 ,无畏光、流泪、眼痛等不适。自诉患近视 1 0年 ,近 5年来 ,双眼视力进行性下降 ,配戴近视眼镜度数仍不断变化 ,散光程度增加。查远视力右 0 Example 1 proband (Figure 1 Ⅲ), male, 20 years old, college students. Left eye vision for more than 2 months in July 8, 1999 for treatment. Patient self-prosecution in February after the college entrance examination left eye vision loss, fearless light, tears, eye pain and other discomfort. Self-prosecution of myopia 10 years, nearly 5 years, binocular vision decreased, wear glasses still changing the degree of myopia, astigmatism increased. Look far right vision 0