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OD is an abbreviation for the Latin term oculus dexter which means right eye. Notice that the right eye information is asked for first even though we typically read from left to right.
OS is an abbreviation of the Latin oculus sinister which means left eye. That will be referenced on the far right column of the prescription.
SPH is short for sphere. The sphere of your prescription indicates the power on the lenses that is needed to see clearly. A plus (+) symbol indicates the eyeglass wearer is farsighted. A minus (-) symbol indicates that the eyeglass wearer is nearsighted.
CYL is short for cylinder. The cylinder indicates the lens power necessary to correct astigmatism. If the column has no value (is blank), it indicates that the eyeglass wearer does not have astigmatism. If this is the case on your prescription, you can leave it blank when entering it in.
AXIS is a prescription will include an axis value for those with astigmatism. This number represents the angle of the lens that shouldn't feature a cylinder power to help correct your astigmatism.
ADD is short for "additional correction." This is where details about bifocals, multifocal lenses or progressive lenses would appear.
The NC300 manual is an essential resource for anyone who uses the NC300 device. By following the guidelines and instructions outlined in the manual, users can ensure safe and effective operation of the device, as well as troubleshoot common issues and perform routine maintenance. Whether you’re a seasoned user or just getting started with the NC300, this comprehensive guide has got you covered.
NC300 Manual: A Comprehensive Guide**
The NC300 is a state-of-the-art device that is designed to provide users with a high level of performance and functionality. It is commonly used in a variety of industries, including manufacturing, engineering, and research. The device is equipped with advanced features such as high-precision measurement, data analysis, and automation. nc300 manual
The NC300 is a highly advanced piece of equipment, designed to provide users with a wide range of features and capabilities. However, with so many features and functions, it can be overwhelming to understand how to use the device to its full potential. That’s where the NC300 manual comes in. In this article, we’ll take a closer look at the NC300 manual, providing you with a comprehensive guide on how to use and maintain your device. The NC300 manual is an essential resource for
Before using the NC300, it’s essential to read and understand the safety precautions and guidelines outlined in the manual. These precautions are designed to protect users from potential hazards and ensure safe operation of the device. NC300 Manual: A Comprehensive Guide** The NC300 is
*Discount applied on the current website price at the time of order. Offer only valid for new customer first contacts order over $10. Maximum discount of $100. Cannot be combined with any other offers. Promotions are subject to change without notice. We reserve the right to cancel orders that are in breach of the terms and conditions of this offer.
| Lens Width | Bridge Width | Temple Length | |
|---|---|---|---|
| XS | < 42 mm | < 16 mm | <=128 mm |
| S | 42 mm - 48 mm | 16 mm - 17 mm | 128 mm - 134 mm |
| M | 49 mm - 52 mm | 18 mm - 19 mm | 135 mm - 141 mm |
| L | >52 mm | >19 mm | >= 141 mm |
Buying eyewear should leave you happy and good-looking. Use our sizing tool to find frames that best fit your unique facial measurements.
Grab a regular card with a magnetic stripe on the back. Student IDs, credit cards and gift cards work well to start our online PD tool.
You may have received our paper PD measurement tool in your recent online order. In order to use this tool, place the ruler on your eyes so that the "0" lines up at the centre in between your eyes. Add up the two numbers, to get your PD. See example below:
Click on this link to download and print your own PD measurement tool.
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