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.
In the last decade, the home security camera has undergone a radical transformation. What was once a grainy, wired, and expensive setup reserved for the wealthy or the paranoid is now a sleek, 4K, AI-driven device available for less than the cost of a family dinner out. From the Ring doorbell to the Google Nest Cam, we have embraced the "smart home" era with open arms, trading a measure of our personal privacy for the promise of tangible security.
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Criminological studies consistently show that visible security cameras are a powerful deterrent. A porch pirate casing a neighborhood is far more likely to target a home without a Nest Doorbell than one with. The simple presence of a camera shifts the risk-reward calculation for would-be thieves. In the last decade, the home security camera
There is a dark side to "checking in." In households with domestic abuse or coercive control, a security camera becomes a tool for stalking. An abusive partner might use indoor cameras to monitor a spouse’s movements, visitors, or daily schedule. Even in healthy families, the constant awareness of being watched can stifle normal, private behavior—turning your living room into a panopticon. Companies like Google and Ring are already rolling
Almost all modern systems use cloud storage. While convenient, this means your intimate moments (late-night arguments, dancing in your underwear, crying fits) are stored on a third-party server. These servers are targets for hackers. Even if the company is secure, a government subpoena can hand over weeks of your life to law enforcement without your knowledge.
*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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