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. 2014 Jun 13;9(6):e96684. doi: 10.1371/journal.pone.0096684

Figure 2. Detection rate of the teachers according to the severity of visual acuity level.

Figure 2

Mild or no visual impairment: PVA equal to or better than 20/70; moderate visual impairment: PVA worse than 20/70 - equal to or better than 20/200; severe visual impairment to blindness: PVA worse than 20/200.