Your eye prescription is measured in dioptres, which measures refractive errors. If you do require a prescription from your optician, it is good to have an understanding of what it means. Knowing What Your Glasses Prescription Means
2020 vision meaning drivers#
Drivers are allowed to wear spectacles or contact lenses when performing this task. For example, in the UK, you can legally drive if you are able to read a number plate from 20 metres and that your eye test presents a visual acuity of 6/12 at the minimum. In addition to building your glasses prescription, eye tests are sometimes required for certain tasks or jobs. Each line gives an idea on your visual acuity.
It is used to measure people’s visual acuity, to assist with assigning the correct glasses and contact lens prescriptions.ĭuring an eye examination, you will be asked to read each line of letters on the Snellen Chart. The Snellen Chart was developed in 1862 by Herman Snellen, a Dutch ophthalmologist. While 20/20 is more widely used in everyday speak, in the UK we say 6/6 vision. While 20/20 vision describes the same ability, but at 20 feet rather than 6 metres.Ĭomparatively, if you have 6/12 vision for example, what you can see at 6 metres away, an average person can see from 12 metres away and you therefore have below average vision. 6/6 vision describes being able to see at 6 metres what an average person can see at 6 metres.
The only difference is depending if you are in the UK or America, as it is measured in either feet or metres. We have all heard people refer to their sight as perfect if they have 20/20 vision, but what does it actually mean? You may have also heard about 6/6 vision.
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