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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.
Home security camera systems are powerful tools for safety, but they are not "set it and forget it" devices. They require a conscious trade-off. To truly secure your home, you must secure the data your home produces. By prioritizing encryption, local storage, and ethical placement, you can ensure that your guardian doesn't turn into a spy.
When your footage is stored on a company’s server, you aren’t the only one who has "access." There is a recurring debate regarding how much access law enforcement should have to private camera networks (such as Amazon’s Ring or Google’s Nest) without a warrant.
If privacy is your top priority, look for systems that support NVR (Network Video Recorder) or SD card storage . This keeps your footage on your own hardware, off the internet entirely. honeymoon sex clip hidden cam indian hotel best
Some budget-friendly camera brands may supplement their income by analyzing user data or metadata to serve targeted ads or improve their AI models, often buried deep within a "Terms of Service" agreement that few people read. The "Neighborly" Privacy Gap
Microphones are often more invasive than lenses. If you only need to see who is at the door, consider disabling the audio recording feature in your settings. Home security camera systems are powerful tools for
Never use a security camera that doesn't offer 2FA. This ensures that even if a hacker gets your password, they can't access your cameras without a secondary code sent to your phone.
The future of home security isn't just about higher resolution or better night vision—it's about building systems that respect the very privacy they are meant to protect. This keeps your footage on your own hardware,
Be a good neighbor. Adjust your cameras to ensure they are focused on your entry points and property line, avoiding neighboring windows or private yards.
*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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