What time is 550 short sighted equal to?

According to the 550 degree myopia degree can not accurately determine the vision is equal to a few points.

Because 550 degrees belongs to the refraction degree, vision is generally through the usual examination of the eye chart to get the value, and the refraction degree and vision value is not balanced, the two can not do each other, so simply according to 550 degrees can not accurately determine the vision is equal to a few points. If you want to know what time 550 degrees is, you can check the eye chart. The international standard eye chart and the right eye chart are often used clinically. The former standard vision requirement is ≥1.0, and the latter standard vision requirement is ≥5.0.