Did you know that the even the best precision eyeglass lenses cannot perform to their highest potential if the centration, i.e., the adjustment of the lenses to the particular frames, the distance between your pupils, the proportions of your face and even your posture have not been measured properly? Up to 40% of valuable visual acuity can be lost this way. This is important for single vision lenses and especially important for the centration of progressive lenses. For progressive lenses, all three vision zones (distance, intermediate and near) have to be optimally adjusted. Ideally, with a normal posture, thewearer should be able to read comfortably while looking through the near zone, work at a computer through the intermediate zone and drive a car with the distance zone. The correct centration and, of course, the selected lens design plays a decisive role in determining the spontaneous tolerability of progressive lenses. A difference of a millimeter can be crucial.
In the past, eye care professionals did the measurements for the centration of eyeglass lenses manually. The glasses wearer looked through the selected frames and the eye care professional used a felt pen on the lenses to mark where the pupils were and the distance between them.
Today, eye care professionals can work much more precisely – with an accuracy of a tenth of a millimeter. The i.Terminal®2 from ZEISS provides an objective image of the glasses wearer with the frames. With the selected frames, the customer stands in front of the centration device and centration is done with a high-quality photo, simply, quickly and extremely precisely. The benefit of this is that the adjustment procedure is more pleasant for you, since the eye care professional does not have to enter your personal space to do the measurement. You should stand as naturally as possible, and look through the glasses exactly as you would do in everyday life. The more precisely your eye care professional knows how you look through your new glasses, the better he or she is able to adjust the lenses. The i.Terminal®2 works with a high-tech camera and intelligent ZEISS software that with one click measures the centration data, saves it and makes the calculations for the production of the eyeglass lenses.
Contact lenses are a very good alternative to glasses – yet there are still a few vision solutions that are only possible with good ol' glasses.
Eyeglasses for near vision and distance vision, progressive lenses, sports lenses, reading glasses or glasses for the workplace: what do you need to know?
Or: When is the best time to go for a vision test?
A lot of experience, mathematics and exact knowledge of the eyeglass wearer’s needs are required to provide a tailored solution
Less is more! These tips are the key to getting ultra-light eyeglass lenses and frames