There comes a time in life, when we will need to purchase glasses, be it for ourselves or for someone we know. At first, you might think that this might be difficult to do online, but actually, this process is much easier than you might imagine. This guide will help you understand everything you need to order your glasses online.
Know Your Measurements
The only true way to know your measurements is to ask an optometrist, they will give you all the specifications that you need. To make an estimate, take a measuring tape and measure the distance between your eyes. Measure from centre to centre and this is your pupil distance. Next, we need to work on the frames.
Know Your Frame Measurements
There are 3 measurements that define your frame size according to industry standard, the diagonal width of the glass, the space for the nose, and the distance from the frame to behind your ear. If you are replacing existing glasses, these measurements will be written on the frame somewhere.
Know Your Prescription
Your prescription will have a plus or minus sign at the front, plus means you are long-sighted, if you are shorted-sighted then you are minus. The number that comes after that is your prescription measured in dioptres, you might have a different number for each eye.
Know Your Lens Type
There are 3 main types of lenses that are commonly found in glasses.
- Single vision lenses are usually used for driving or for reading
- Bifocal lenses are used when you are both near-sighted and far-sighted. There is a portion in the top of the frame for the distance, the then the reading lens is located at the bottom portion, making it possible to fulfill 2 prescriptions in one pair of glasses.
- Varifocal lenses serve the same purpose as the bifocal lenses, but they tend to look nicer and they have an added benefit of having an intermediate power range built-in, which might make it easier to focus on objects in the middle of your range.
Know Your Lens Materials
There are many different materials available for your lenses.
- Standard lenses are made from plastic and are ideal if you have a low prescription.
- High index lenses can bend more light, so they are thinner than standard lenses, so they are normally more cosmetically pleasing to the eye.
- Polycarbonate lenses are pretty much unbreakable and are the best option if you wish to keep a pair of glasses for a long time. Also, they are ideal for playing sport, or for active children.
- Photochromatic lenses are clear indoors, but outdoors they will ract to light conditions and also they can offer UV protection against the sun.
It is easy to purchase glasses online, SureSpecs can guide you through the process and help you make the choices to get the perfect pair of glasses.