圆锥角膜常见问题 什么人容易患圆锥角膜？ 据研究统计，圆锥角膜的发病率为1/2000，其中男女比例基 本一致，各种族间也没有明显差异。虽然目前引起该疾病的原因还不很清楚，但研究表明可能和遗传和其他环境因素有一定关系。 圆锥角膜有什么症状？ 最初，一个早期的圆锥角膜患者经常出现视力的细微改变，随着疾病的发展，视力将出现波动，近视镜和角膜接触镜的度数经常改变。发生这一现象的原因是由于角膜比较薄的部 分由于眼压的作用在眼表明发生彭出。随着疾病的进展，光 线进入眼中发生扭曲，也就是不规则散光。眼球的外部开始 彭出，造成看上去像是圆锥形。 圆锥角膜会影响双眼吗？ 会的，大约有70％的圆锥角膜患者会双眼发病，不过，每眼 发病的速率和时间可能有着很大的不同。 什么是圆锥角膜通常的发病年龄？ 圆锥角膜的发病可以发生在8－45岁中的任何年龄段，大 多病例中，疾病的变化在十余年的时间中缓慢的形成，一 般在30－40岁时会趋于稳定。

Frequently Asked Questions Who gets keratoconus? Researchers estimate that keratoconus affects 1 in 2000 people. The disease affects men and women alike and there are no known differences between races. Although the cause of the disease is unknown, research has suggested that genetics, allergies and other environmental factors may contribute to the onset of the disease. What are the symptoms? Initially, a person with early stage keratoconus will notice a subtle change in their vision. As the disease progresses, one's vision will fluctuate and frequent changes to one's glasses or contact lenses often occur. This happens as a result of a thinning taking place within the cornea and bulging caused by one's normal eye pressure pushing on the weakened front surface of the eye. As the disease continues to advance, the light rays entering the eye become significantly distorted, called irregular astigmatism. The outer portion of the eye begins to bulge, creating what often looks like a cone shape. Does keratoconus affect both eyes? Yes, in approximately 90% of keratoconus cases the disease will manifest itself in both eyes. The rate of progression and the timing of the onset of the disease is typically different for each eye. What is the usual age of the onset of keratoconus? The onset of keratoconus can occur anywhere between the ages of 8 to 45. In the majority of the cases, it becomes apparent during the teen years and slowly worsens before stabilizing somewhat in the 30's or 40's.