If this is your first pair of spectacles, ask the optician to explain in detail the different types of lenses. For higher powers, high-index materials may be the best solution for you to minimize the weight and thickness of the lenses.
When the lenses have been determined using the trial frame in the refraction room, you should take the time, particularly if you are buying spectacles for the first time, to look through the selected lenses for a while, to walk through the room wearing them, and perhaps to read a text at a normal reading distance.
Lens enhancements such as anti-reflective coatings, hard coatings, Clean Coat to make cleaning easier, etc. are also important considerations. Your optician will be happy to explain the options to you. When you intend to use your spectacles - for everyday wear, as a spare set of spectacles or only for specific occasions - is particularly important. Spectacle lens coatings can play a very special role, for example if you are often blinded by the sun or by the headlights of oncoming traffic. Perhaps spectacles with self-tinting lenses would be the best solution for you.
If you are already used to wearing spectacles, you should take the opportunity to discuss in detail with your optician what you particularly liked about your old spectacles and what you felt was not ideal. Small details can be very important in this regard and make seeing with spectacles much more relaxed and comfortable. Lens technology and coating options are also enhanced on an onging basis.
Reading spectacles are the first pair of spectacles for many people. Generally, a distinction is made between two different types: normal reading spectacles with conventional frames and half-frame or half-moon spectacles. With the half-frame spectacles, you can look through the lenses when you lower your eyes, and see normally when you raise your eyes above the lenses. For both versions, the usual reading distance (i.e. the distance between your eyes and a book or an e-book reader) and the distance between your eyes are important factors in determining the optimum lens powers. It may be helpful to make a few notes at home in everyday situations before your eye examination, e.g.: how far from my face do I hold my mobile phone or book for reading while I am seated, and how far away when I am lying down? What’s the distance between my eyes and my laptop screen? Did you know, for example, that you hold your smartphone closer to your eyes than a book when you are reading? This valuable information helps your optician to optimize your reading spectacles for your vision habits.
Progressive lenses, though they are very common today, are small optical masterpieces. The goal is to create spectacles that enable you to see as if you had your original good vision without spectacles. Thus, multiple vision solutions must be integrated into a single lens, seamlessly and optimally to ensure the best possible interaction of your eyes. This is an optical challenge that requires great expertise, in-depth knowledge of mathematics and precise knowledge of each individual spectacle wearer.
A special method is used to manufacture progressive lenses. When grinding the lens surface, various functions are integrated into one and the same lens - for near vision, distance vision and the transitional range. Moreover, a progressive lens should not only facilitate sharply focused vision when you look straight ahead through it, but also when you look to either side or up and down. All these tiny surfaces must be optimally coordinated with each other and meticulously calculated. Thus, your optician can provide many different levels of quality and degrees of customization for you to choose from. Ask your optician to provide you with detailed advice, so that you can get used to your new spectacles very quickly and enjoy natural vision.
As a rule, the frames for progressive lenses should not be too small, as this will not provide enough space for the various vision zones. Moreover, the optician should not wait to fit your progressive lenses until you pick them up. Precise centration of the lenses in the new frames is crucial. If the alignment is just a few millimetres off, this can suffice to cause neck pain and headaches or can prevent you from taking full advantage of the progressive lenses.
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As for reading spectacles, the distance between the lenses and the object being viewed plays a major role in spectacles used at the workplace. In this context, this is called the “working distance.” Thus, before you buy spectacles for your work, you need to find out the range of viewing distances that you need: how far away from the screen do I normally sit? At what distance do I hold objects in my hand that have to be processed?
And that's not all. Do you frequently have conferences with colleagues or customers and need to be able to switch your focus easily and comfortably to different viewing ranges? Are lenses made of plastic or glass better for my needs?
Particularly at work, you need to be able to see properly and comfortably and focus quickly at the required viewing distances. Lenses can enable you to do this if you tell your optician exactly what you require. It may be advisable in some cases to use special workplace spectacles instead of your everyday spectacles.
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Where exactly you will wear your new sports spectacles plays a central role in the selection of the optimum eye wear: for what type of sports and in what situations will you be wearing your spectacles? For example, biking spectacles should provide proper UV protection as well as effective protection from the wind, e.g. via the size and curvature of the frames. Spectacles with polarizing lenses provide optimal protection against glare and are an excellent solution for constant changes between light and shadow.
To prevent unpleasant surprises, all sports enthusiasts who wear helmets should always bring their helmets with them to the optician. For skiers, on the other hand, having a second pair of spectacles to fit underneath the ski goggles may be a good alternative to contact lenses. In this case, an anti-static coating is recommended to prevent fogging, or you can have ski goggles made to your prescription or have a clip made to fit over them.
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They changed the world with their ideas
The ZEISS Vision Science Lab at the University of Tübingen in Germany carries out fundamental research into vision