Can you find out your prescription from old glasses?
There are two answers...the simple one...and you guessed it, the not so simple one... To answer your Q Firstly,yes there is a way to 'measure' the sprescription straight off the glasses on a small instrument called a focimeter. It will read the power from both lenses. But you can only get that done at the eye doctor's place. Secondly, I don't know how it works in the US(Im in the UK) but it is a legal requirement for every eye doctor in UK to hand a prescription giving all these details to the patient at the end of every test. So if this applies to the States then you shouls already have this document somewhere(if you have kept it safe) Thirdly, again in the UK, we are not allowed to use a prescription to make up a new pair of glasses after two years have expired. In this instance the patient must have a new test done becaue his eyes may have changed, and also to determine the health of the eye which is crucial. Really, at the end of the day your eyes are soooo important. Maybe lend some money off your parents/relation/friend and get your eye test done and pay them back later? An eye exam is such a good all round health/eye check. Most people don't even know the full advantage of it! Have I convinced you? : )
Is my new eye glass prescription wrong?
I've been wearing my old computer glasses for 4 years. They have been getting gradually a little blurry, so I went and had a new eye exam. I think the new prescription is wrong because my vision is now worse with the new glasses. I had the glasses checked by the optician and the optometrist. They both said the glasses matched the prescription. My optometrist told me that I think too much and to wear the glasses for a couple of weeks to get used to them. I can't see my computer clearly enough to work comfortably, so I went back to the old glasses. Here are the two prescriptions: Old: Sphere Cylinder Axis OD -2.50 - - OS -2.75 - - New: Sphere Cylinder Axis OD -1.75 -0.50 100 OS -2.75 -0.50 105 If my vision is getting blurry such that I have to move closer to the computer to see clearly, shouldn't that be indicative of needing a stronger prescription? The new prescription seems to be weaker than my old one. Is the new prescription stronger or weaker? There was no change to my left eye, yet it is blurrier than my right. Am I thinking too much? Additional info: the doctor's assistant did the refraction, after which the doctor came in and dilated my eyes. Shouldn't my eyes have been dilated for the refraction test?
Help with my new eye prescription?
Both your old and new Rx have corrections for astigmatism. Your left eye changed more than the right eye, usually that means you would feel the "funny strain" more on the right side. At any rate, the changes made by your doctor are logical. Odds are the doctor did his/her job correctly. You should take the glasses back to the person who made them and have them re-verified against your new prescription. Have them remeasure your pupillary distance and verify the glasses to the prescription. There are a number of errors that can cause the problems you describe. The prescription change you had from old to new might cause you some mild eye strain for a few days as your ocular muscles learn to use the new lenses, but if it has been over two weeks you should be past adaption. It is very important, do not change to your old glasses while you are adapting to your new Rx. If you do it might cause you difficulty adapting to the new one. If you still have problems after having them make sure the glasses were made correctly, schedule a re-test with the doctor who prescribed them. Take the glasses with you to that appointment. You will be surprised how often people are told their problem glasses are correct, when they really aren't. Like I typed, you changes look pretty logical.
Can I put in new prescription lenses into my old eyeglasses frame?
For the best answers, search on this site https://smarturl.im/aDDq1 The answer is "maybe". If both frames fit you then the "A" and "DBL" measurement should be about the same. This is what we would use to determine the placement of the optical center of the lens directly in front of your pupil. Depending on how much larger your old lens is in relation to the new frame, we may be able to place the lens in the new frame where the optical center is still directly over your pupil. If not, then ... Depending on your prescription, there may be leeway in the placement of the lens optical center in relation to your pupil (we call this induced prism) where the placement may be optically acceptable. The next "maybe" is that your old lens must be large enough to cut into the new frame without leaving gaps in the new frame. If both of these conditions exist then there is a chance that your lenses can be cut down into the new frame. I've done it before myself. Your optician at your optometrist's office will be able to tell you if it can be done.
Is it normal for the axis in my eyeglass prescription to change this much in one year?
two time in a persons life would this be normal I believe one would be during/following pregancy or through your growing years such as especially in your teen years. not a professional opinion ask the doctor for a "correct answer"
It can be by using a Focimeter (I think lensmeter in North America). A history: Focimeters How to Use a Focimeter For most glasses this is straight forward, single vision, bifocals and varifocals/PALs. In some cases where there is prism built into the lens or in a varifocal that doesn't have a standard 4mm drop from the marking up cross it can be more difficult and attempts to replicate new glasses from old measurements would be difficult. There is also the human error (and industry manufacturing tolerances) consideration. Assuming the glasses have been made up perfectly to the prescription and assuming the prescription has been measured correctly from the glasses and then assuming the new glasses where made up correctly from these measurements. Small mistakes would tend to compound and you could end up with a result a bit too far away from where it should be. Focimetry is very important to find a starting point to begin an eye test as not everyone adapts to change in prescription well, particularly noticeable in patients with astigmatism. Small changes in ocular centres or axis rotation can have a big impact on visual comfort and adaption. I've had patients where we have had to remake their glasses to match old incorrect ocular centres despite it not being the same as their pupil centres because that was what they were used to - and that wouldn't have been possible without focimetry.
As mentioned already, they would not make new glasses for you without proper prescription in some countries.However, it varies wildly across the globe and people bend the rules frequently.In same places they use autorefractor to get a quick prescription reading, which is not correct way as measurement can be very inaccurate in many cases.As I've witnessed in couple of developing countries I have had visited, you can get a reasonably good refraction done by skilled individual very cheaply. For majority of the cases this is enough, however, some people require professional if their refractive issue is more complicated.In Canada (where I reside), it is possible to order glasses or contact lenses online quite cheaply and they don't seem to care too much if the numbers you supply them with are accurate or not and as a result you get what you pay for…Getting glasses made based on Rx of old glasses might be worth it only if you broke your newish glasses and your vision with those was satisfactory. Otherwise it’s always best to get up to date refraction done.
Is it okay to wear an old glasses prescription?
In the short term, your old prescription glasses will not harm your eyesight. Your eyes will simply adapt to the change in focus when you put them on and then off. Most professionals agree that a ten day period is needed in order for your eyes to fully adjust to any new prescription (and even then it is not permanent). So as long as you are not using them all day for weeks on in, you are fine. However, in the long term, any pattern will affect your eyes. This is the whole method behind correcting vision in the first place. If you are to wear your old glasses every day for a few hours after a year, your vision will change. This can get complicated and is why you should talk to an optometrist for details about the process. Bottom line, go ahead and use them on an "as needed" basis so long as you do not use them too much. You could also try buying a cheap pair of reading glasses. Also, go ahead and talk to you opti -a quick call with a question is often free and very accurate.
Wearing the wrong prescription of glasses does not do any damage to the eyes. Glasses are just refractive aids which will not affect the eyes in adults. In children, wearing the wrong prescription can cause Refractive Amblyopia. What is amblyopia or "lazy eye" and what are treatment options available? You can wear any prescription but you may not necessarily be comfortable in it though. The question details asks for a similar but another question altogether:After a bad Lasik experience, my eyes are at 20/80 and 20/100. Over a slow healing period throughout the last two years, they've gone from not being able to be refracted at all to nowadays where glasses are finally effective in getting me to 20/20 20/25.A few months ago, I started wearing a pair of my friend's old glasses and my vision was great. After losing those, I went to the opthamologist and got a new prescription.I had a pair made with that new prescription, and my vision isn't nearly as good as it was using the glasses that weren't mine. I've been considering getting a new pair made with his prescription now, since I know it works. Is there any danger in wearing the wrong prescription if I see better?From the description I see that you are comfortable with your friend's glasses and that's quite possible. The new pair of glasses has a power that is probably more nearer to your refractive error than your friend's glasses.The new pair of glasses may not necessarily be wrong, it is just that your eyes need to adjust to the new power. There is usually a "breaking in" period for new glasses whenever the prescription changes ( just like shoes). The breaking in period is faster if the glsses are worn continueously. If you wear it occasionally, your eyes will need more time to adjust.I would advise you not to throw away the new glasses just yet. Give your eyes some time to adjust by wearing it most of the time you are awake. Your eyes should adjust in about a week if not earlier.Given that the refractive error is correctable up to 20/20 and 20/25 please consult with your Ophthalmologist if you are a good candidate for Top-up LASIK so that the residual refractive error can be corrected.Thanks for the A2A Sarvani Arepally