Contact Lenses Prescription Conversion Table
If you are currently wearing frames and have not yet used contact lenses, it is recommended that you make the following conversions, no action is required for prescriptions less than -4.00, the following are only for prescriptions above -4.00.
Contact Lenses Prescription Conversion
| -4.00 ~ -7.50 | -7.75 ~ -11.25 | ||
|---|---|---|---|
| Frame Glasses | Contact Lenses | Frame Glasses | Contact Lenses |
| -4.00 | -3.75 | -7.75 | -7.00 |
| -4.25 | -4.00 | -8.00 | -7.25 |
| -4.50 | -4.25 | -8.25 | -7.50 |
| -4.75 | -4.50 | -8.50 | -7.75 |
| -5.00 | -4.75 | -8.75 | -7.75 |
| -5.25 | -5.00 | -9.00 | -8.00 |
| -5.50 | -5.00 | -9.25 | -8.25 |
| -5.75 | -5.25 | -9.50 | -8.50 |
| -6.00 | -5.50 | -9.75 | -8.75 |
| -6.25 | -5.75 | -10.00 | -8.75 |
| -6.50 | -6.00 | -10.25 | -9.00 |
| -6.75 | -6.25 | -10.50 | -9.25 |
| -7.00 | -6.50 | -10.75 | -9.50 |
| -7.25 | -6.50 | -11.00 | -9.75 |
| -7.50 | -6.75 | -11.25 | -9.75 |
Note 1:Â If you have a slight astigmatism (astigmatism less than -1.50, and the ratio of myopia and astigmatism is greater than 4), you can add one-half of the astigmatism in the optometry, and then convert the corresponding contact lens prescription. (Example 1: myopia-4.50 astigmatism-0.75 converted to -4.50 degrees; Example 2: myopia-4.50 astigmatism-1.00 converted to -4.75 degrees)
Note 2:Â If you do not have myopia, please select “PLANO”.
Note 3:Â If there is no corresponding degree for a certain myopia, you can choose the degree that is closest to the lower one (e.g. -8.00 degrees reduced by 75 degrees is -7.25 degrees, if there is no -7.25 degrees, you should choose -7.00 degrees, and so on).