Single vision glasses
Everything you need to know about single vision lenses
Computers, televisions, pads and smartphones have changed our lifestyle. Digitization makes life easy in many ways, but the new age also has many disadvantages. Our eyes, in particular, have a harder time than ever, as we use the close-up view more to recognize the small characters and the pixelated elements on our screens. Our eyes make considerable efforts to adjust changes in the distance of vision, which leads to an overload of the eye muscles. The consequence? We see worse and our eyes are constantly tired. In order to remedy the situation and to avoid overexertion, single vision lenses are recommended, which not only correct the near and far vision, but also support the eyes.
What is a single vision lens?
These are corrective lenses for correcting a single view, i.e. either for close-up or distant view. So if you are short-sighted or far-sighted, single vision glasses are just right for you. The glasses can also be equipped with other additional finishes. Depending on requirements, these can be anti-reflective, scratch-resistant, anti-blue light or self-tinting. Please note that the purchase of this type of glass is only possible with a prescription after consultation.
The different types of single vision glasses
For far sight
If your optician or ophthalmologist stated in your prescription that you need far sight lenses, then single vision lenses are just right. We are talking here about simple corrective lenses that allow you to correct your eyesight daily to get a complete and simple field of vision for your activities
For the near vision
As soon as presbyopia occurs (the near vision becomes weaker with age), single vision lenses are essential for reading. These glasses were specially developed to correct myopia or hyperopia when adding presbyopia and are mainly used for older people over 40 years. For optimal comfort, ophthalmologists measure vision at a distance of approximately 40 cm, the distance that corresponds to reading a book.
Which glass material is best?
In general there are two types of materials for the manufacture of unifocal glasses: mineral and organic glasses. The most commonly used material today is organic or plastic glasses. Plastic lenses have many advantages such as weight, scratch-resistant, adaptable to any frame and thinness for high corrections. Mineral glasses, also called real glass, have a higher weight, which severely limits comfort. Another disadvantage is that the glasses are not break-proof, which can be dangerous in an accident. In general, mineral glasses should only be used for certain purposes and strong corrections and never in children.
With plastic glasses you can add a wide range of add-ons at low prices such as a lotus layer that makes the rainwater roll off, an anti-reflective layer against parasitic reflections, an anti-blue light layer to protect against the blue light that comes from screens etc. The possibilities are endless and thanks to these treatments the life of your glasses can be drastically extended.
Please note that rimless frames are only suitable for glass thicknesses of 1.6 or 1.67. The index 1.5 or 1.74 cannot be used due to the extreme thickness or thinness.
Other additional options for unifocal lenses
Unifocal lenses are designed so that they are also suitable as sunglasses, especially with UV filter categories 1 to 4. You can therefore filter the sun's rays, more precisely UVA and UVB rays. Note that a phototropic treatment of tinted glasses for filtering the sun's rays is also possible with single vision glasses for the thickness indicators 1.67, 1.60 and 1.50.
Depending on the manufacturer, in some cases you have the option of adding blue light protection. This is a treatment that can protect you from the blue light. Blue light is nothing more than the light that is emitted by technological devices such as televisions, telephones and computers.
The different possibilities of single vision glasses
According to the manufacturers and the optician, different types of single vision lenses can be found depending on the specific needs of the patient.
Standard single vision lenses
Standard single vision lenses are spherical lenses. They have radii of curvature on the front that have the same value as the center on the edge of the glass. This type of lens is mainly intended for people who need lenses with small corrections. However, it is also suitable for those looking for better value for money. This type of glass should only be worn on the recommendation of an optician.
The extra fine glass
In the single vision lens category there is also an extra thin lens with a longer front from the center to the edge of the lens. As a result, the front of the lens is slightly modified to get a lot of aesthetic glasses. This type of lens is particularly suitable for people who need medium to strong correction lenses.
Digital single vision lenses
These are mainly glasses that offer precision down to the nearest micrometer and have specific dimensions for each wearer. This type of lens is mainly intended for patients who need a medium to strong correction. For those who want better clarity and an extremely precise field of view, this type of glass is a good compromise. These high-end glasses are sold by Visionet on request.
In short, there are unifocal lenses for all needs.
