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BASE CURVE? #4527716
09/27/17 03:19 PM
09/27/17 03:19 PM
Joined: Dec 2003
Posts: 9,929
Florida, Cape Coral
Eddie Offline OP
Eddie  Offline OP
Joined: Dec 2003
Posts: 9,929
Florida, Cape Coral
What is meant by a "BASE CURVE" when buying sunglasses? Some models are base curve 6 and others are base curve 8. Might this be the radius of the classes if laid on a piece of paper and a circle drawn where the lenses are part of that circle? Ed


CX5 Touring 2.5L :-)
Re: BASE CURVE? [Re: Eddie] #4527720
09/27/17 03:26 PM
09/27/17 03:26 PM
Joined: Mar 2013
Posts: 5,040
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 5,040
The Midwest
Might be the lens spacing. My wife eyes are spaced further apart than the average woman and she can't buy any old sunglasses.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Wanted: 2019 Ford Ranger
Re: BASE CURVE? [Re: Eddie] #4527728
09/27/17 03:43 PM
09/27/17 03:43 PM
Joined: Feb 2007
Posts: 84
Maryland
chemman Offline
chemman  Offline
Joined: Feb 2007
Posts: 84
Maryland
Base curve is the actual curvature of the lens as measured from the inside of the lens using an instrument called a lens clock. The flatter the lens, the lower the base curve number. Hence a lens base curve of 6 is "flatter" than a lens base curve of 8.

Some people who wear glasses are extremely sensitive to the base curve of a lens. Having the wrong base curve and throw off an otherwise correct and accurate lens prescription (it has happened to me a couple of times).


92 Olds 88 Hav 5w30 PL/L24011
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99 Silverado 5.3L Hav 5w30 PL/L25288
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Re: BASE CURVE? [Re: Eddie] #4527889
09/27/17 06:50 PM
09/27/17 06:50 PM
Joined: Dec 2003
Posts: 9,929
Florida, Cape Coral
Eddie Offline OP
Eddie  Offline OP
Joined: Dec 2003
Posts: 9,929
Florida, Cape Coral
Thanks chemman. These are not prescription so base curve is not so important? Ed


CX5 Touring 2.5L :-)
Re: BASE CURVE? [Re: Eddie] #4536496
10/07/17 07:19 PM
10/07/17 07:19 PM
Joined: Feb 2007
Posts: 84
Maryland
chemman Offline
chemman  Offline
Joined: Feb 2007
Posts: 84
Maryland
Maybe, maybe not. You need to try them to make sure. In my wife's case, it's extremely important.


92 Olds 88 Hav 5w30 PL/L24011
99 Buick Century Hav 5w30 PL/L24011
99 Silverado 5.3L Hav 5w30 PL/L25288
04 TrailBlazer 4.2L Hav 5w30 PL/L25288

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