It is normal that as the eye ages, the vitreous begins forming "webs" (floaters) which are "cracks" in the vitreous.
正常来说，随着年龄增长，玻璃体会开始形成‘网’，这其实是玻璃体的裂缝。
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Vitreous hemorrhages present as hazy vision and photophobia with the perception of shadows, floaters, smoke signals, cobwebs, or lines in the visual field.