New to Online Eyeglasses? Click Here!
Ongoing: Click here for 15%-off EVERY ORDER at EyeBuyDirect This is the best ongoing deal on the internet for EyeBuyDirect!
Goggles4U drops prices, drops additional discount codes. People are concerned, but this is still one of the best places to buy online. Link!

Get an extra 5% off the typical GlassyEyes 15% discount this week at EyeBuyDirect.

Here's how it works:

  1. Click here.
  2. Use code "glassyeyes20" at checkout
(Also posted on twitter at

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At August 27, 2009 at 6:59 AM Keith Irwin said...

Taking an extra 5% off of the 15% discount is not the same as a 20% discount because the discount is compounded.

For example, if you make a $1,000 purchase and take 15% off, that comes to $850. Then if you take another 5% off of the $850, that's a $42.50 discount, making your final price $807.50, which is not the same as taking off 20%, which would result in a final price $800.

No tweet for you!

At August 27, 2009 at 10:22 AM Ira said...


Math is fun. I understand (and have made) your argument a number of times -- it's a real hit at parties! At the basest level though, when not dealing with economists as your primary audience, 20% is "an extra" 5% over the typical 15%.

More semantics than anything else in a forum such as this. I will be more clear next time though! ;-)

In fact, I think I'll have an opportunity to rectify this with another deal later today.

Thanks Keith!


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