How to choose glasses frames – top 5 things to consider

How to choose glasses frames top 5 things to consider

There are two steps in buying eyeglasses 1. select a frame, 2. choose lenses.

This article will discuss on the things that you should consider when selecting glasses frames online.

First of all, you should look at the size of the glasses frames. More and more online optical stores provide virtual try on system for customers to upload photos and try on glasses online. However, many virtual try on systems do not rescale the glasses to your photos in proportion to show the relative size of the frames to your face. An accurate sizing system is important because majority of the frame models come only in one size. If you like the frame style but find the frame is too large or too small for you, very likely you will not find a frame of the same model that would fit you.

Secondly, lens limitations on certain frame styles.

In semi-rimless frames, groove is created to hold the nylon. While the groove holds the nylon to support the lenses to the frame structure the groove also weakens the lenses making it more subject to chipping. You can use normal plastic lenses however, impact resistant lenses are highly recommended.

Only impact resistant lenses can be used for rimless frames because the lenses have to be strong enough to allow holes to be drilled through.

Impact resistant lenses (e.g. polycarbonate lenses) generally cost more than normal plastic lenses (e.g. C39 lenses). This means higher cost in making glasses using semi-rimless and rimless frames. However full-rim frames generally do not have such limitation.

Thirdly, consider the purpose of the eyewear you would like to achieve.

Eyewear frames can be fitted with single vision lenses for distance only or near only. However, if you like the frames to be fitted with multifocal or bifocal lenses, i.e. use the glasses for both distance and near vision, then there is a lens depth requirement on the glasses frames. Depending on the lens design, some optical store requires the lens depth for multifocal lenses to be as large as 30mm.If you intend to buy glasses frame at one place and have the lenses fitted somewhere else, make sure you ask about the lens depth requirement beforehand.

Material of the frame is another thing to consider.

If you live in consistent humid weather condition or if you tend to sweat a lot on your face, or if you have hyper-allergic type of skin, metal frames may not be a good option. Good alternatives are frames made of plastic or titanium.

If you have a strong prescription, you should also take your prescription into consideration.

For example, if the sphere of your prescription is -9.0, the lens is usually very thick on the edge even with very high density index 1.74 lens. To reduce the edge thickness, it is recommended to choose frames with small lens width and lens depth. Semi-rimless and rimless frames should be avoided where possible because of the thick edge.

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