It says Sphere;Right eye -0.25, Left eye -0.50
Cylinder- Both are -0.00
And Distance acuity- Right 6/4, Left 6/4-2
Near Acuity- NV
What does this mean in terms of 20/20?
2007-02-24 04:51:35 · 4 answers · asked by Anonymous in Health ➔ Other - Health
"Sphere" represents the amount of long or short light that is present. The larger the number the stronger, and therefore the thicker the spectacle lens will be. Plus lenses are used to correct long sight and minus lenses are used to correct short sight.
"Cylinder" represents the amount of astigmatism that is present. Astigmatism is caused when the eye is not completely spherical (like a football) its shaped more like a rugby ball. This causes the vision to be distorted for both distance and near objects. The cylinder may be plus or minus regardless of whether the sphere is positive or negative.
"VA" stands for visual acuity. This indicates the standard of vision (for each eye) when corrected. It may or may not be included in the prescription and is usually presented as a fraction. In the UK, VA is conventionally measured at 6m, so the numerator is 6 (eg 6/6). In the US, VA is measured at 20 ft (eg 20/20). The larger the denominator, the worse the eye sees, so a VA of 6/12 is half as good as 6/6.
"Near VA" represents the smallest sized print that can be read with the prescription. This is usually written as Nx where x is a number representing the print size. N5 is the smallest sized type that you will normally find and N8 is approximately the size of normal newsprint.
2007-02-24 05:05:40 · answer #1 · answered by Zyrilia 4 · 1⤊ 0⤋
1
2016-06-19 17:43:56 · answer #2 · answered by ? 3 · 0⤊ 0⤋
It means basically you can't see that well. Your right eye sees better than the left one.
2007-02-24 04:59:53 · answer #3 · answered by Anonymous · 0⤊ 1⤋
call them back and ask them.
2007-02-24 04:57:21 · answer #4 · answered by m&m 2 · 0⤊ 1⤋