In the US, roughly one-third of our children, although born with normal vision, end their school years with abnormalvision, condemned to wearing glasses the rest of their lives.
在美国,大约三分之一的儿童,出生时视力正常,毕业时视力异常,只好戴上眼镜。
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Since there is little bleeding, the surgeon maintains a clear field of vision during the procedure, enabling complete removal of the abnormal tissue while avoiding critical nerves and blood vessels.
Glaucoma: This is caused by an abnormal rise in pressure in the eyes that damages the optic nerve and results in defective vision and narrowed visual field.