What is -5.25 vision in the 20/20 format?!

The Snellen fractions, 20/20, 20/30, etc., are measures of sharpness of sight. They relate to the ability to identify small letters with high contrast at a specified distance. They give no information about seeing larger objects and objects with poor contrast (such as steps and curbs); it also does not inform us as to whether or not meaning is obtained from visual input, how much effort is needed to see clearly or singly, and whether or not vision is less efficient when using both eyes as opposed to each eye individually. In short, visual acuity measures only the smallest detail we can see; it does not represent the quality of vision in general. That is known as the visual acuity.

So many people in the forum want to know what their visual acuity is, but actually , it means very little to know what it is.

The only way to know for sure is by reading the chart without glasses on , but you can't even see the chart without them , so it probably wasn't even measured.

On average though , someone with your prescription would be around 20/400

Optician