A test for pressure inside the eye, or intraocular pressure, is one way to screen for the disease, but people with normal pressure can still have glaucoma.

测试眼压(intraocularpressure)是甄别此病的一种方式，不过，眼压正常的人仍然可能患青光眼。

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But there has been growing awareness that a large percentage of glaucoma patients, perhaps more than half, have normal or near-normal intraocular pressure.

但是人们日益认识到，大部分青光眼患者(可能超半数)眼内压正常或接近正常。

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According to the intraocular pressure (IOP), POAG can be grouped into high tension glaucoma (HTG) and normal tension glaucoma (NTG).

根据眼内压的高低，POAG可以被分为正常眼压性青光眼(ntg)和高眼压性青光眼(HTG)。

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Normal-tension glaucoma is a form of the disease which leads to blindness without the usual increase in pressure inside the eyeball.

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