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This site has an interactive table that will explain all of the contact prescription info.<br />
<a href="http://www.allaboutvision.com/contacts/contact-lens-rx.htm" rel="ugc">http://www.allaboutvision.com/contacts/contact-lens-rx.htm</a><br />
<br />
TK
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This site has an interactive table that will explain all of the contact prescription info.
http://www.allaboutvision.com/contacts/contact-lens-rx.htm [http://www.allaboutvision.com/contacts/contact-lens-rx.htm]

TK

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here's another:<br />
<a href="http://www.usaeyes.org/lasik/faq/read-eyeglasses-contacts-prescription.htm" rel="ugc">http://www.usaeyes.org/lasik/faq/read-eyeglasses-contacts-prescription.htm</a><br />
OD = right eye and OS = left eye.
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here's another:
http://www.usaeyes.org/lasik/faq/read-eyeglasses-contacts-prescription.htm [http://www.usaeyes.org/lasik/faq/read-eyeglasses-contacts-prescription.htm]
OD = right eye and OS = left eye.

like 

od: -450-075 x100 
 os: -400-075 x070 

what does this mean ?

how do you read a contact lens perscription

A miscellany is defined as a "collection of various pieces of writing by different authors", but it has come to mean something "Of items gathered or considered together of various types or from different sources" or "a collection or group composed of members or elements of different kinds". The word "miscellaneous" comes from the Latin word "miscere", meaning "to mix." You might have heard the expression "a mixed bag," which applies when you don't quite know what you're going to get. More commonly, a miscellaneous group is made up of an odd group of things that don't fit anywhere else.