The set consists of the vertex disance gauge and conversion disc, supplied in a practical wallet. The gauge is used to measure the corneal-spectacle lens distance and the rotary conversion disc allows calculation of the equivalent effective power required. You can also purchase the disc or gauge separately. Please select your choice using the dropdown menu.
| Shipping Cost |
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| Delivery Time | 7-14 DAYS |
| Shop Location | London, London, United Kingdom |
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