You’re better taking a few minutes to get a proper measurement using our advice above. If you wear single vision glasses, it can be okay to use average PD’s. For example, your right eye Mono PD could be 32.5mm and your left eye could be 33mm. Your mono PD’s will vary ever so slightly. In fact, the most attractive celebrities have facial asymmetry… phew. You can measure your mono PD yourself with a basic ruler, but we suggest you use our free PD ruler which locates onto the centre of your nose for a more accurate result.ĭon’t worry, most people have a slightly asymmetrical head. Generally, total PD’s or average PD’s are considered as insufficient for varifocal prescriptions. Varifocal glasses have a higher tolerance of accuracy as they are a more complex lens type. This lets us that your lens centres are as accurate to the centre of your pupil as possible. However, if you require complex or strong prescription lenses such as varifocals, it’s imperitive that you provide your dual PD's as per each of your eyes. This is usually for single vision glasses wearers. These can be added together, but only if require a PD total. Your prescription paper may use dual PD’s as standard.
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