So you've decided that since it's freezing outside it's that time of the year when snuggling up in front of a log fire with a warm cuppa and good book seems like the most logical thing to do but as you sit down you hear a loud 'crack' and see that you've shattered your glasses! The last thing you feel like doing is going out to get new glasses but you need not fear as now you can buy prescription glasses online.
In the past obtaining high index prescription glasses online was simply not possible and hence would require a visit to an optician and the payment of more expensive high street prices for the glasses. Online prescription glasses possessing a sphere value ranging between + 23.00 and - 26.00 are however currently available at certain specialised online service providers. Not sure what a sphere value is? Let's start at the beginning where we pay a visit to the optometrist or ophthalmologist who are specialists qualified to issue prescriptions for eyewear. These specialists will makes use of a machine called a phoropter to test a patient's eyes and to determine whether they have problems with their vision and whether they need glasses to correct it.
Glasses are made up of lenses and frames and lenses are curved objects usually made of a transparent substance such as glass that have the ability to disperse or concentrate light rays. An example of a commonly known spherical lens is a magnifying glass. A lens is called spherical when each surface is part of a sphere. When a spherical lens like a magnifying glass, magnifies it does so equally in all directions or meridians. The written prescription provided by these specialists has to indicate various parameters which will provide the specifications for your glasses to a dispensing optician. One of the parameters on a prescription for glasses is the sphere value. The sphere value is listed on the prescription in columns along with the cylinder value. These values are indicative of the optical power requirement of the lens and are measured in units called diopters.
The role of the dispensing optician is to use the values on these prescriptions to make up lenses for your glasses and also to fit and adjust them to the frames of your choice. Similarly once you have your prescription you can use it to buy prescription glasses online and take advantage of the vast array of options for lenses and coatings at significantly lower prices than one would pay on the high street, just in time to enjoy that good read in front of the warm log fire.
If you wish to find out more on prescription glasses online please visit our website Glasses Frames and Lenses
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