What are progressive lenses, and why should we give so much money for them?
THE PROGRESSIVE LENSES – EASY SOLUTION FOR ALL DISTANCES
Back ten years there has been a great expansion in both sales and technological progress in the development and design of progressive glass lenses. Today market customers have a large selection of different types of progressive lenses by different prices. What are the differences between individual progressives? Progressives that are designed before ten or more years are products which have a much narrower field of view for distance, middle distance and reading than the products that were made 2-3 years back which we can see in the picture No. 1.
What is the area for a certain distance wider and the area of blury vision smaller, the comfort and sharpness of seeing are better. How can we see at all distances with progressives? Easy, with coordinated movements of our head from right to left and focusing the eyes through a certain part of progressive for the preferred viewing distances as shown in picture No. 2.
Price is often a key parameter while selecting a type of progressive which is normal but still it should be like that. Selecting less quality progressive we only currently save money but we lost in all other fields. Width of visual fields, acuity, quick and easy adjustment is directly linked to the design of progressive, i.e the width of its parts for viewing (the so-called progressive channels). Each progressive, so as the older generation has the proper width for the distance part while the central part of it and a part to read are much narrower which significantly reduces the breadth of visual field for these two distances. From these facts we may conclude, if you decide to buy a progressive glasses, select the type with as broad progressive channel as possible because only the purchase of a new generation will get a product that ensures high quality vision at all distances, and forget the difference in price because progressives are carried all day by two to three years or until your dioptre changes.
There are things you need to know and that are some limitations that progressives have:
• Fields of blurry vision that are situated on the marginal parts of the lens, mostly in its lower part so that the view through that part of our progressive the image will not be sharp (the gray part on the first picture)
• Reduced width of visual fields to 25% for middle distance and reading compared to on single-strength glasses
• Need a lot more attention when walking on the stairs, it’s not enough to just look down below, because in this case, you’re watching the area for reading and it is intended for viewing at distances up to 60 cm. It is necessary to direct the view through part for the distance (head tilt down) and so have a clean image.
When you purchase progressives keep patience while your optician takes measures that are required for installation because it is very important that the progressive center and your pupil flip so that later you won’t have problems when using eyeglasses. Ask to learn how to use them, what are the advantages, and what are flaws. Also always ask to be given your glasses prescription and the original packaging or bags of glasses in which also you can read all the information (dioptre, the type of lenses, the manufacturer i.e all you need if you should order one lens to be identical to the first one. Also, if you have the habit of reading in bed, it is important to have backup single-strength glasses to read so you would easier your viewing especially in the evening when the eye fatigue is the strongest. If you need to carry glasses for distance and for reading make a step forward and have an easier life, decide for progressive glasses. If you’re unhappy you can always return to two or even three glasses, but if you do not try you will never know how it is to have only a pair of glasses for all distances.
Written by: Poleto Vjekoslav