Is -0.5 and -0.75 the same as a -1.25 prescription?

Question

If you wear -0.5 contact lenses and -0.75 glasses, does it total to -1.25? And is it alright to do that or is it very bad for your eyes?

Answer 1

no that would only equal -0.80 and it's not the same i woulden't do that it's not that great for your eyes

Answer 2

No, different # means different prescription

Answer 3

a) Yes... almost. At that little of power the actual power changes very very minutely. Lenses change power depending on how far from the eye they are (called vertex distance) and like I said, so little of a base power hardly changes at all... so, yeah, its about a -1.25.

b) Depends... is -1.25 your Rx? if so, then sure, go for it. It's a complicated way to get the desired Rx, but hey, whatever floats your boat.

Now if you mean bad for your eyes as in permenately damage them... then nope.. it won't hurt you're vision. Even if the Rx is waaaay off it has been throroughly proven that wearing a different Rx, not wearing one when you should, sitting too close to the TV, etc. cannot harm your eyes.... eye strain yes, but not change you're Rx and worsen your eyes.

And if you are wearing someone elses CL's.... well that in and of itself is a HUGE no no. Way too many problems can occur, allergic reaction, corneal ulcer, corneal abbrasions, corneal edema, infections, etc.... so in that case, yes. It will harm your eyes.

Answer 4

So you wear your contact lenses and your glasses? I think its time for a check up at your eye doctors to get your new perscription

Answer 5

http://www.aclens.com/prescriptionhelp.a...  "How to Read Your Contact Lens Prescription"

The only numbers I've ever seen for my glasses prescription are sphere, cylinder, and axis.  According to the website cited above, cylinder and axis only apply if your contact lenses are correcting for astigmatism.  Presumably this is true for glasses, too; as I do in fact have astigmatism.

If someone doesn't jump on here and offer an answer to your question, call a local optical and ask.  I think I know people online who wear contacts and glasses together, but their prescriptions are way higher than -1.25.  I believe my latest prescription for the right (lazy) eye is -14.00, just to give you an idea of the online context in which I know these people.

I tried contacts briefly.  I have "dry eye syndrome," and I am also a bit clumsy.  This led to a corneal abrasion, which led to a week at home with No Lights Please!  So when people use contact lenses to thin their glasses prescription, all I can say is Yikes.  :-(

Since there are therapeutic uses for contact lenses and glasses together, ask your ophthalmologist or optometrist.  With your prescription as low as it is, my guess is that he/she also will say Yikes.  Alternately, he/she might write you a prescription for contact lenses which requires no supplemental glasses at all.  If you want the glasses for protection from soccer balls or other projectiles, you can get plano lenses (I think that's the right spelling; it means that the lenses do not correct anything at all and would not add to the power of a contact-lens prescription).

If your end goal is to make your glasses look thinner, you might be better served by going to one of those "glasses in about an hour" places and asking about polycarbonate lenses (much thinner than glass for the same prescription power).

Answer 6

Yes, it would give a total power of -1.25 D.