It’s exciting. You’ve chosen a new pair of glasses that look fabulous, you can’t wait for people to start getting used to the ‘new you.’ You have that savvy, whimsical look that you’ve been dying to have all your life. You watch the optician that you have spent half the afternoon with, scribble down your ‘refractive errors.’ But be unknown to you, that prescription will be handed down, rewritten, reissued and re-entered before those spectacles are created and issued to you. Plenty of room for error! This explains why millions of people are prescribed the wrong glasses. Proper tests and checks are not always carried out sufficiently.
To avoid getting the wrong prescription glasses, make sure you understand what is being prescribed to you. The first line of your prescription (OD or R) is what needs to be changed for the right eye, and the next line (OS or L) is for the left. The unit of measurement for adjustment is calculated in ‘diopters.’ A ‘+’ indicates magnification for farsightedness and a ‘-‘ correction for nearsightedness. If you cannot see through your prescription glasses clearly, make sure you ask the optician to confirm the lens power. The numbers there should match the numbers on the prescription. If it does not, the optician should replace the lenses with the correct prescription – it may be that the numbers have been mixed up in the process. Be sure to always photocopy your prescription.
Some symptoms of wearing the wrong prescription glasses may include blurred or fuzzy vision, as well as headaches, eye strain, dizziness, vertigo and nausea.However, you may rest assured that there are no long term effects. It’s different with prescription contact lenses, because each person has a differently shaped cornea, and so it would be obvious if you were wearing contacts not designed for you.
If the opticians are correct in their prescription, then it may be that you simply need time to adjust to your prescription glasses. Varifocal lenses, in particular, take awhile for your eyes to get used to them – anything from a few days to a month, and the period of adjustment can cause headaches and disorientation. To help adjust to your varifocals quickly it is worth wearing them all day to get used to them, and to start removing them as soon as you begin to get a headache. Another tip, is to move your whole head towards an object when viewing it, rather than just moving your eyes. Move objects closer or further away when looking through the distance or reading part of your lens: varifocals are designed to assist your vision at certain points, if objects are too close or too far then you are defeating the purpose of wearing varifocals.
However, if your eyesight is still blurred (or subject to other symptoms) despite not wearing varifocals, then it is best to contact your optician. The lens within the frames may need to be readjusted.