Common Prescription Questions
Where do I get a prescription?
You can find some suggestions for where to get a good deal on your eye test here.
How do I get a copy of my prescription?
The optician is legally obliged to provide you with a copy of your prescription after your eye test. If they don’t give you this, make sure you ask them.
How recent does my prescription have to be?
Your prescription must be no older than two years. Your recommended intervals between eye tests vary depending on your age and health – find out more about eye tests in this article.
How do I know if my prescription is wrong?
The first thing to check is the values of the prescription your optician provided with the specification that we have supplied. This will be saved on your online account. If the values don’t match please contact us right away to let us know, and return the glasses to us along with a copy of the original prescription.
If they both match, the prescription still might be correct, so please don’t worry. Most new prescriptions take a little while to get used to, especially if there has been quite a change since your last one. It’s best to persevere, but if the new glasses are giving you eye strain and you haven’t settled into them after wearing them for 2-3 days, please let us know and one of our opticians will advise what to do. It will be helpful to know your previous prescription, if you have it, so we can compare.
Is my prescription too strong?
Glasses Direct cannot fulfil orders to customers with eyesight in the following ranges
- The combined SPH and CYL is greater than +/-9.00
- The CYL is over +/-4.00
- If there is more than 5.00D difference between each eye
- If the total horizontal prism is over 8.00D or the total vertical prism is over 4.00D.
Orders where the combined SPH and CYL exceed +/- 8.00 can only be placed over the phone.
What is a weak/strong prescription?
A weak prescription is one where the Sphere (SPH) value is less than +/- 1.50 and the Cylinder (CYL) is less than +/-0.75. A strong prescription is one where the SPH is over +/-5.00 or the CYL is over +/-2.00.
People whose prescriptions have a SPH between +/- 1.50 to +/- 5.00 and CYL values between +/-1.00 to +/-2.00 might think their prescriptions are really high, but from an optician’s point of view they’re considered moderate.