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Old 08-27-2017, 08:33 PM   #61
Thinks s/he gets paid by the post
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Originally Posted by omni550 View Post
I've been wearing rigid contacts for 47 years with great corrected (mono)vision.

I noticed that when doing my 19-hour cannonball run to/from Michigan-Florida, after a long day of driving, driving after dark was getting to be a strain on my tired eyes. Years ago, I spoke with my optometrist about this "tired eyes straining after dark" issue and she prescribed 'booster' glasses that I can wear while wearing my contact lenses. Basically, they give me corrected stereoscopic vision (seeing distance with both eyes). And they help a lot.

I am wanting to order another set of these 'booster glasses' and would prefer to get them from Zenni or elsewhere online to save $$, especially since I only use them a few times a year.

I've had the booster glasses for ~10 years and the Rx is no longer in the system at the optician's office. Last week I had an eye exam and while there, I asked the tech if she could tell me the Rx of the driving booster glasses. She put them in some sort of measuring instrument and gave me the "Sphere" reading for each lens (Right -2.25 and Left -0.25) which she also entered in my file.

My question is --- does anyone here know --would "booster" glasses also need to have specific cyl, axis, and add measurements like typical eyeglasses have? OR would all 3 of those values simply be set to "0" (as I'm only ever using them for distance vision while driving after dark)?
I have copies of the last few old Rx's for my "everyday" glasses (which were purchased for back-up and have never been worn as my contacts work so well) so I know what the cyl, axis, and add values were. I have some astigmatism and the last few Rxs for glasses also were basically (progressive) bifocals. too.

So, I went ahead and ordered a set of 'booster' driving glasses (to be worn over my contact lenses for long drives at night) from They had a sign-up offer on their site for $9.90 incl. shipping.

I asked their online help person if I needed to add astigmatic correction to the Rx I sent to them....and they said "yes', so I grabbed the cyl and axis measurements (along with PD) from my latest glasses prescription. For the sph correction I used the values the tech read on my old glasses in her measuring instrument.

The glasses arrived in 10 days. I trialed them driving last night. I'm very pleased. I especially like that they are light weight and have larger lenses than my old 'booster' driving glasses that are ~10 years old (when smaller lenses were in vogue.)

So now I have a back-up pair, just like I wanted, for under 10 bucks.

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