To investigate the cause of deterioration of vision after trabeculectomy.

目的探讨显微小梁切除术后视力减退的原因。

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Most of our deterioration of vision is caused by looking at things directly in front of us.

视力变差的多少原因是直接注视我们面前的东西。

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Caused by the deterioration of the macular - the tiny part of the retina responsible for picking up colour and fine detail - macular degeneration affects the vision of more than half of over-75s.

黄斑是视网膜的一小部分，具有感光和精细视物功能。黄斑点退化导致黄斑变性，从而影响视力。过半以上的75岁以上老年人深受黄斑变性的困扰。

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Over a period of years, dry AMD can progress to a gradual deterioration of retinal cells, which can result in severe vision loss or lead to the wet version of AMD.

CNN: New techniques slow progress of age-related vision loss