Solved

how do you read a contact lens perscription

Posted on 2009-07-10
3
165 Views
Last Modified: 2012-05-07
like

od: -450-075 x100
 os: -400-075 x070

what does this mean ?
0
Comment
Question by:kaos_theory
3 Comments
 
LVL 12

Expert Comment

by:TK-77
ID: 24828628
This site has an interactive table that will explain all of the contact prescription info.
http://www.allaboutvision.com/contacts/contact-lens-rx.htm

TK
0
 
LVL 25

Expert Comment

by:nickg5
ID: 24832156
here's another:
http://www.usaeyes.org/lasik/faq/read-eyeglasses-contacts-prescription.htm
OD = right eye and OS = left eye.
0
 
LVL 32

Accepted Solution

by:
aleghart earned 312 total points
ID: 24856477
od  |  -450  |  -075  |  x100
(od) right eye
(-450) refractive error measurement: -4.50 sphere or diopter = near-sighted, approximately  20/300 vision; you can see at 20 feet what others can see from 315 feet away.
(-075) astigmatism measurement: -0.75 cylinder
(x100) axis measurement: location of the astigmatism...no correlation to degree of correction, just where the correction needs to be

os  |  -400  |  -075  |  x070
(os) left eye
(-400) refractive error measurement: -4.50 sphere or diopter = near-sighted, approximately  20/300 vision; you can see from 20 feet what other people can see from over 280 feet away
(-075) astigmatism measurement: -0.75 cylinder
(x070) axis measurement: location of the astigmatism...no correlation to degree of correction, just where the correction needs to be


So, in summary, you are nearsighted (myopic) to the point that you can only read clearly from about 9 inches away.  (1/4.50)=.222m=8.7in.

You have astigmatism in both eyes...which means that your eyeball varies from spherical, like a bump or a depression.  In some people, depending on location and severity of the variation, darkness will cause the iris to open up and expose some of the irregularity, causing distortion.

Hope this helps.  I've had myopia ranging from -4.50 to -5.25 diopters...great for proofing film on a light table without using a loupe.  But...terrible for navigating a SeaDoo at 60mph when one contact is blown out of your eye.  :)
0

Featured Post

Highfive Gives IT Their Time Back

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

Join & Write a Comment

This is a quick article, and by no means should you quit your job today or plan to feed your family of 5 on a business idea. Starting a business takes work. This article will only give you the basic skeleton of understanding. Going into business for…
Since 2008, the stock markets have been in a haphazard state of fluctuation. At times it has been a steep decline (2008) and at others, a steady incline full of promise (2010). Just weeks ago, in August 2011, together we saw the stock markets plunge…
Notifications on Experts Exchange help you keep track of your activity and updates in one place. Watch this video to learn how to use them on the site to quickly access the content that matters to you.
Saved searches can save you time by quickly referencing commonly searched terms on any topic. Whether you are looking for questions you can answer or hoping to learn about a specific issue, a saved search can help you get the most out of your time o…

760 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

20 Experts available now in Live!

Get 1:1 Help Now