Monofocal lenses are used to correct any type of refractive error:
myopia, astigmatism or hyperopia.
They are called monofocal because the same prescription is used for the entire surface of the lens.
Myopia manifests itself as the difficulty of focusing on objects located at greater distance, that is, far vision.
Astigmatism is the most common visual condition after myopia; It affects near and distance vision and causes blurred or distorted vision. It can appear alone or associated with myopia or hyperopia.
Hypermetropia is a visual defect that allows you to see distant objects clearly but that does not allow you to focus clearly on nearby objects. Or, if they focus, it causes unusual eye strain or fatigue.
Recommended for people who suffer from presbyopia, aged 40/45 and over and who do not want to continually change glasses. In fact, they are lenses that allow you to see well at any distance, simply by moving your eyes towards the place that
you want to observe.
This lens consists of three parts:
- The upper part of the glass : it is used to see well from a distance (more than 1 meter)
- The middle part of the glass: it is used to see well at intermediate distances (between 40 cm and 1 meter)
- The lower part of the glass: it is used to see well up close (40 centimeters or less)
ADVANTAGES OF PROGRESSIVE LENSES
- You only need a single glasses for all distances.
- There are no “jumps” image and vision is more natural.
- They are more aesthetic than bifocals, as they are completely smooth.
- They are ideal if you need to change your gaze distance frequently.
- After a period of adaptation Its use is very satisfactory.
Our lenses are 100% manufactured in Spain thanks to Prats and Hoya laboratories.
While in progressive lenses the lower zone of the lens is prescripted for near vision (40 cm) and the upper zone for far vision, in occupational lenses the upper zone is prescripted for intermediate distance (approx. 2 m ), adapting to a specific visual demand of many jobs.
Remember that occupational lenses are not a substitute for progressive glasses.
Click on the "I have doubts" button if you need more information .
<tc>BOOK YOUR FREE EYE PRESCRIPTION</tc>
If you are new to the world of progressive lenses or need advice, come to any of our stores in Madrid, Valencia and Barcelona.
Our qualified optometrist will be willing to answer all your questions. Come visit us!
If you are looking for protection from the sun, try our polarized sunglasses. The polarized filter blocks reflected light and only lets useful light through. Take a look at these two images.
The polarized lens is one that prevents excessive glare and reflections, prevents us from straining our eyes and, in this way, we achieve greater clarity in our vision.
You can apply it to any sunglasses that do not carry the asterisk for "cannot be prescribed"
Photochromic lenses are photosensitive lenses, that is, they adapt to ambient light: they lighten on the inside and darken on the outside. For this reason, photochromic glasses can be worn throughout the day without the need to change glasses.
WHY IS THE USE OF PHOTOCHROMIC LENSES RECOMMENDED?
- For Protection, it is very important to protect the eyes from UVA and UVB rays.
Photochromic lenses block 100% of these radiations at all times.
- For comfort: Photochromic lenses prevent glare and reduce eye fatigue
for more comfortable vision, in addition to improving contrast of colors.
Their special characteristics make them ideal for people with sensitive eyes.
You may have heard of them as blue filter glasses: we tell you about their benefits in much more detail in our section on computer glasses.
At Greyhounders we offer a range of lenses 100% made in Spain to present users with a tailor-made visual solution. We have the Prats and Hoya certification. Together we want to offer a high quality product at an affordable price, thus improving people's lives.
WHAT MATERIAL ARE THE LENSES MADE WITH?
Our lenses are made of CR39 organic material. This compound was the first material of organic origin to come onto the market as an alternative to glass, the only material used to date for the manufacture of crystals. CR39 has a very low density, making these lenses lighter. The weight is reduced by up to 50% and, in addition, it resists blows and falls better.
The lenses have different thicknesses depending on the prescription of each. We work with index lenses: 1.5, 1.6 and 1.67 and 1.74, which we explain in detail below:
1.5 INDEX LENSES
They are lenses made of organic material or CR39, weigh half as much as glass. They are suitable for prescriptions of less than +-2 diopters.
1.6 INDEX LENSES
They are 30% thinner than 1.5 lenses. They are suitable for prescriptions between
+-2 and +-4 diopters.
1.67 INDEX LENSES
40% thinner. They achieve a notable aesthetic improvement by preventing the eye from appearing larger or smaller depending on its graduation. They are usually used in cases of +-4 diopters to +-6 diopters.
INDEX LENSES 1.74
50% thinner and therefore very light. They achieve perfect efficiency, transparency and aesthetics. They are suitable for prescriptions higher than +-6 diopters.
*When the graduation is very high and we exceed +-12 diopters, it is advisable that you contact us so that our experts can advise you. They will advise you for free which type of lens best suits your visual needs.