A 1.5 vision is when you stand five meters away and can see 1.5 on the visual acuity scale, which means the person has normal vision and the refractive error is orthoopia, or has mild hyperopia. A farsighted person can adjust the exact position to 1.5 by adjusting the power, so 1.5 is zero if the person is orthoopic. If a person is farsighted, it may be plus 100 degrees, plus 200 degrees, and no more than plus 300 degrees, depending on his or her accommodation power. So there are only two possibilities for 1.5 vision, one is orthoopia without degrees, the other is hyperopia between 100-300 degrees, but 1.5 vision is normal vision, no degrees is also normal.