Eyeglasses Final Inspection and Verification per ANSI Standard

We believe in the importance of completing a proper final inspection prior to dispensing any prescription eyewear to our patients.
Did you know that many online websites selling eyeglasses, optometry offices and opticals don’t actually complete the necessary final inspection that is expected of them prior to dispensing prescription eyeglasses? Some either don’t have the time or simply don’t understand how to do so. A final inspection is extremely necessary and is not something to be taken lightly. It’s enticing to buy the cheapest thing online or when you try to be an optician without the necessary training, by self measuring without understanding how to do so, therefore guestimating your PD, but this is detrimental to your sight. Why? Because it may cause unwanted prism, image jumps, unnecessary eye strain, and much worse.
We have tested out stand alone (no physical optical dispensary or lab completing final inspections) online websites for eyeglasses and more often than not, the glasses are not within tolerance, thereby the prescriptions fail inspection and should not be dispensed to patients. Many still ship these glasses out because they understand consumers will not go through the hassle of returning the glasses.
If you ever feel like your eyes are straining beyond comfort level, then most likely, something is wrong. A proper troubleshoot appointment is needed with an experienced optician who is at the very least, certified, but preferably licensed to do a thorough troubleshoot prior to going back to your Optometrist to re-examining you.
Take care of your eyes, you’ve only got one set.

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What are the four corners? Two are near the temple tips. The other two?

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the two temple arms , and the two lenses