Most people in the world have eyesight problems that require the use of professional optical devices, whether they are contact lenses or glasses. One wonders why it is always so difficult to juggle an optical shop then! In reality the answer is very simple: the alternatives when it comes to choosing glasses are really many. So it’s very easy to get confused! Let’s try to do some order.
The first step in choosing glasses: always start with the Rx
Whenever you have to select a new frame, it is always correct to start by looking at the prescription. If you have a simple prescription, you may not need to worry too much about the frame type as well, but for those who have more than plus or minus 2 diopters shortage, the choice of frame will have a direct influence on both the correct function of the glasses. , which on weight and on the aesthetic aspect. The rest will then depend on the type of visual defect.
Type of glasses depending on the optical function
The type of disorder is another of the things to consider carefully when choosing glasses.
Being Myopic for example, we will generally need lenses with 3 distinct characteristics:
- Thickness on the outer edge of the lens and thin center
- Flatter front surface curve (also known as base curve)
Furthermore, this defect makes the wearer’s eye seem smaller than it actually is, therefore, even on an aesthetic level we must take these characteristics into account. Due to the increased thickness on the edges due to the specifications of the lens, the round shape is ideal. But since not everyone likes round shapes, we can opt for rectangular glasses with rounded corners.
Farsightedness, on the other hand, generally involves lenses that have:
- Thickness in the centre of the lens and thin edges
- Steepest front surface curve (also known as base curve)
This disorder makes the wearer’s eyes appear larger than they actually are
With the thickness concentration in the centre of the lens, a thin frame will help a lot, but most of the weight and thickness will have to be handled directly by the lens material.
We then move on to glasses suitable for presbyopia
Presbyopia is also known as age-related hyperopia and typically begins around age 40. Our eyes are normally adapted to focus on near objects, but as we age this becomes more difficult.
You will have to choose between these 4 eyewear options:
- Single vision reading glasses
When it comes to presbyopia, it is good to avoid wide-surface frames when deciding for multifocal: in fact, an optician can usually insert a multifocal lens in almost any frame, but we advise you to avoid shapes that have a low vertical height. As a general guide, try to select a shape that has a vertical height of at least 30mm. This will allow you to have enough space for the distance reading part, intermediate and focusing at a short distance.
If you prefer reading glasses with single lenses, you can choose spectacle frames as small as you want. However, one thing must be said: keep in mind that the smaller the frame, the less constraints you will have on the eye when you read and this is a feature that often annoys many people.
The dilemma of aesthetics in optics: the type of spectacle frame
The selection of a frame is certainly the most difficult part for those who buy glasses but also the most complicated one for the optical shop that follows you and advises you in your purchases. The considerations we have made so far are, in fact, of a purely functional nature, with a very small precaution on aesthetics (the one relating to the external perception of the eye covered by the lens). Whether you shop online or in a store, you are likely faced with a seemingly endless amount of options. The things we think you can’t help but consider once you’ve found the correct lens type are:
- the weight of the material and how comfortable it feels: if you have to wear glasses all day this will be a very important factor
- the type of material used, in case you lead an extremely active life, you will need very resistant materials
- how do you feel.
In fact, it is useless to spend words on choosing the perfect frame if you don’t think they suit you.
That should be your main focus.