Quality lenses for superior optical performances.
The warranty is 24 months from invoicing date, provided if the instructions for use are followed, and applies for the material, anti-reflex coating and photochromic/polarizing properties. The lenses will be identified by the original envelopes, together with this certificate. Please keep them.
Excluded from the manufacturer’s warranty are normal wear and tear and deficiences arising from improper usage of the lenses (scratching, mechanical shocks, exposure for to high temperatures) or their use for another purpose.
Read the instructions before starting to use the product.
By properly maintainig the lenses, you benefit from a clear vision for a long time.
Interoptik ophtalmic lenses, organic or mineral material, single vision, bifocals, degressive and progressive lenses, are class I medical devices, in compliance with the requirements of MDR (UE) 745/2017 and ISO standard 13485:2016 – used for the correction of visual impairments only on the specialist recommendation, on the basis of a medial or optometric prescription, and used only with the spectacle frame as a support.
Grinding on the contour and glazing in the frame shall be done only by authorized persons, in compliance with the prescription and the centering data. If the product is damaged or requires further adjustment, ask your optician for advice. Do not try to repair the glasses by yourself.
Wash the lenses with hot water and a drop of liquid soap, then rinse well. Wipe them only with a clean and soft cloth, preferably made of microfiber.
Do not place the glasses with the lenses facing down on hard surfaces. Whenever you are not wearing the glasses, they should be stored in a glasses case.
When you are not at home you can use special microfiber cloths or other special care products recommended by your optician.
Do not expose the glasses to very high temperatures, above 60 degrees, like in the sauna or on the board of a car parked in the sun. Do not use the glasses as a specialized means of protection, for example when welding or swimming. Protect the lenses from contact with aggressive chemicals. Hairspray or hair gel can damage the surface of the lenses. Do not wear the glasses on your head.
General information
• Spectacle lenses are used to correct ametropia and eye position errors.
• Spectacle lenses are medical devices of the class 1, covered by the Regulation (EU) 2017/745 on medical devices and meet the relevant requirements. The proof of conformity is based in some criteria on compliance with the standard EN ISO 14889 “Ophthalmic optics – Spectacle lenses – Fundamental requirements for uncut finished lenses” and the applicable standards of the EN ISO 8980 series. All lenses in the Interoptik product catalogue are tested according to EN ISO 14889 and EN ISO 8980-1:2017, 8980-2:2017, 8980-3:2013 and 8980-4:2006 and are marked with the CE mark on the lens bag.
• In order to ensure proper and professional ophthalmic optical care, reference is made to the applicable national guidelines for ophthalmic optics and optometry and the ECOO guidelines in Europe.
• Spectacle lenses are designed for everyday use in normal environmental conditions (temperature and humidity), but not for extreme conditions such as in a sauna or in a car parked in the sun.
• Spectacle lenses are intended for use in pairs in a spectacle frame, i.e. as a combination of right and left lenses in front of the eyes of the wearer.
• Spectacle lenses are usually not worn in combination with contact lenses if they already correct the same customer-specific vision problem.
• Spectacle lenses are calculated so that the ambient medium on the eye and object side is air (n=1.0). For best vision ander water, e.g. when swimming or diving, the refraction data must be converted.
In order to obtain a driving licence, there are minimum requirements for visual acuity, which must be achieved with or without a visual aids (glasses or contact lenses) by means of an official driving licence vision test.
In case of reasonable doubt, the applicant shall be examined by an additional medical authority. If a visual aid is required to pass the eye test, this will be noted on the driving licence.
The applicable minimum requirements may vary depending on the country. If necessary, please enquire about the locally applicable requirements.
Materials of spectacle lenses
• Lenses are available in different materials and refractive indices.
• The higher the refractive index, the thinner the lens can be and the lighter the glasses.
• At the same time, the lower the refractive index, the lower the dispersion (higher Abbe number) in a prescription lens and thus also the “colour fringing” that is perceived as disturbing when peripheral vision at the edge of the spectacles is concerned. This effect is particularly visible with high optical power.
• Interoptik and Aveo plastic lenses are available in the refractive indices 1.50, 1.53 (Trivex), 1.59 (Polycarbonate), 1.60, 1.67 and 1.74.
• For the refractive indices 1.50, 1.60 and 1.67, self-tinting lenses made of plastic are available, in which the UV radiation of sunlight triggers a self-tinting effect.
• The PRO410 and UV420 materials have a light protection that goes beyond conventional UV protection, partially filtering out potentially harmful short-wave light in the visible range of the spectrum so that it cannot damage the retina.
• Ophthalmic lenses made of mineral glass have a correspondingly higher weight than comparable plastic lenses due to the higher density of the material.
• Mineral glasses are offered in the indices 1.52, 1.60, 1.70, 1.80 and 1.90.
• Photocromatic products in mineral glass are also available for the refractive indices 1.52 and 1.60.
• The guarantee for Interoptik and Aveo spectacle lenses is only valid for the described intended use and with proper application.
Refinements of spectacle lenses
• A large portfolio of different tintings is available on plastic lenses. In addition to the UV protection in the material, UV radiation or short-wave light can be reduced. The most common use is dark tinted lenses as sun protection. Lighter tints are mainly used for fashion aspects.
• Plastic lenses are mainly offered with hard coatings to ensure good scratch resistance in daily use.
• The vast majority of lenses are coated with an anti-reflective coating to reduce the reflections of both surfaces.
• Alternatively, sun protection lenses can be coated with a mirror finish, which looks chic.
• Many coatings are finished with a water and grease-repellent topcoat and thus allow easy cleaning of the lenses.
• Most available coatings include a combination of hardcoat, anti-reflective and topcoat.
Suitability for road use or night driving:
• A lens is considered to be roadworthy if it is suitable for road use and driving in accordance with EN ISO 14889 and 8980-3:2013 or 12312-1:2013.
• A lens is considered to be fit for night driving if it is suitable for road use and driving in twilight or at night in accordance with EN ISO 14889 and 8980-3:2013 or 12312-1:2013.
Notes on Interoptik and Aveo sun protection lenses
• Interoptik and Aveo spectacle lenses are primarily intended for the manufacture of prescription spectacles and meet the requirements of Regulation (EU) 2017/745 and the EN ISO 14889 standard, which also includes tinted prescription lenses.
• If two plano power lenses are used for the production of sunglasses, the requirements of Regulation (EU) 2016/425 and EN ISO 12312-1 must be observed. When grinding in afocal sun protection lenses, EN ISO 12312-1, section 11 “Protective requirements” must be observed. Interoptik and Aveo spectacle lenses meet the relevant requirements.
• Information for spectacle wearers such as the filter category and, if applicable, self-tinting or polarising properties of the lenses can be found in the Interoptik and Aveo product catalogue. The description of the filter categories, their values for light transmission and their recommended use can be found in the following table.
Filter category Luminance transmittance | Descriptive label | Usage |
|---|---|---|
0 81 – 100% | Light tint sunglasses | Very limited reduction of sunglare |
1 44 – 80% | Limited protection against sunglare | |
2 19 – 43% | General purpose sunglasses | Good protection against sunglare |
3 9 – 18% | High protection against sunglare | |
4 3 – 8 % | Very dark special purpose sunglasses, very high sunglare reduction | Very high protection against extreme sunglare, e.g. at sea, over snowfields, on high mountains, or in desert. Not suitable for road use and driving |
Transport and storage conditions of uncut finished lenses
• The following climatic conditions must be observed when storing raw-edged lenses for longer periods of time until further processing: Temperatures of 10 to 25 °C and a relative humidity of less than 60 %.
General information
• Spectacle lenses are not suitable as eye protection against mechanical hazards such as impacts and flying sparks.
• Since the refraction data of the wearer of spectacle lenses can change, it is recommended to check the refraction data at regular intervals.
• Due to the lens geometry, limited optically effective diameters are possible for higher myopia.
• Spectacle lenses are basically suitable for driving vehicles and operating machines. Differing properties are specified in the Interoptik and Aveo product catalogue.
• A lens is considered to be roadworthy if it is suitable for road use and driving in accordance with EN ISO 14889 and 8980-3:2013 or 12312-1:2013.
• A lens is considered to be fit for night driving if it is suitable for road use and driving in twilight or at night in accordance with EN ISO 14889 and 8980-3:2013 or 12312-1:2013.
• Degressive lenses and lenses used in reading glasses are not roadworthy.
• Many tintings are not roadworthy, see tabular listing in the Interoptik and Aveo catalogue.
• For all special designs on customer request that are not included in the Interoptik and Aveo product catalogue, it must be assumed that they are not suitable for road use and driving.
Restrictions on the use of tinted lenses
• Tinted lenses are not suitable for direct observation of the sun.
• Tinted lenses are not suitable for protection against artificial light sources, e.g. solaria.
• Lenses of filter category 1 – 3 and self-tinting lenses with light transmission values of less than 75% are not suitable for driving in twilight or at night.
• Lenses of filter category 4 are not suitable for driving and road use.
• Tintings with certain spectral properties are not suitable for driving and road use according to EN ISO 14889 and 8980-3:2013 or 12312-1:2013.
• No contrast-enhancing effect can be guaranteed with Sport/Drive colours.
Additional usage instructions for self-tinting corrective sunglasses
• With self-tinting sunglasses, the light transmission values depend on the ambient temperature, UV radiation and other influences. Our self-tinting lenses are tested in the laboratory under standard conditions. Under everyday environmental conditions (above 10°C with normal sunlight) they are suitable for driving and road use. At low temperatures or in particularly strong sunlight, reduced values for light transmission according to filter category 4 may occur, although this category cannot be guaranteed in every case. At high temperatures or with reduced solar radiation, correspondingly higher values for light transmission can result.
• Interoptik and Aveo plastic lenses are suitable for night driveing according to EN ISO 14889 and 8980-3:2013 or 12312-1:2013.
• Real values of the photocromic lens are determined indoors (faded) or darkened at 20 °C in the midday sun.
• The laboratory values are measured according to EN ISO 8980-3:2013 or 12311:2013.
• photocromic mineral lenses are not unrestricted suitable for night driving according to EN ISO 14889 and 8980-3:2013 or 12312-1:2013. The main reason for this restrictions are the materialdepending slower lightening process for mineral lenses compared to modern plastic lenses.
• In the case of self-tinting lenses, the classification is additionally dependent on the degree of darkening.
• Due to the way the self-tinting lenses work when darkened by the sun’s UV light, the darkening process is very fast, whereas the lightening process is slow, especially at low temperatures. This is particularly important when the wearer of glasses changes from bright sunlit areas to shaded or dark areas. Lenses that are still dark can lead to impaired vision in dark areas. If possible, the glasses must be removed in these areas for better vision, or in the case of high levels of ametropia, colourless replacement glasses must be used until the fading has taken place.
This effect does not occur when driving a closed car (not a convertible), as the windows in a motor vehicle are largely UV-nontransparent.
• The points mentioned for restrictions of use and foreseeable misuse are only examples and do not claim to be complete. Reference is made to the contents of the chapter “Intended use”.
Refraction & Centring
• Spectacle lenses must be centred in front of the eye of the wearer in such a way that the respective valid fitting requirement of the lens is met.
• The lenses must be fitted according to the specified centring specifications and the resulting spectacles must correspond to the transmitted order parameters. Depending the provided frame and centring data, Interoptik determines the best suitable pre-decentration for some lenses with regard to the lens geometry.
• The lens bag contains information that facilitates exact centring for the respective lens.
• When ordering prismatic spectacle lenses, Interoptik assumes that the prismatic values ordered have been determined according to pupil centre centration (PCC case). For prismatic refraction data of multifocal lenses, it is assumed that the refraction was done according to the formula case. The ordered prismatic values are implemented in the lens according to the order values.
• The majority of lenses are provided with permanent markings (engravings). These serve to identify the manufacturer and, in some cases, also the type of lens and are generally only visible when the lens is held against the light at a light-dark edge.
• Lenses are stamped in most cases. These stamps are used to clarify the reference points in the lens, to check the power (measured vs. verification / ordered power) and for correct centring by the optician. After checking the power and centering, the stamp on the lens must be removed.
• Spectacle lenses are packed in a lens bag for delivery to the optician. This bag is provided with a label which contains the data relevant for a medical device, such as the manufacturer’s address and CE mark, as well as order-related information on order and reference values and centring information
Grinding notes
• The grinding and processing of the lenses must be carried out according to the state of the art by the respective specialist companies, such as opticians and grinding workshops.
• When grinding in, always make sure that respirable fine dust is avoided by wet grinding or sufficient suction devices. If necessary, personal protective equipment for laboratory work must be worn (safety goggles, mouth/nose protection, lab coat). Particularly with highly refractive plastic materials (from index 1.60 on), unpleasant odours are produced during grinding, which can best be counteracted by suction.
• Any subsequent processing of the delivered spectacle lens, such as tinting, mirroring or anti-reflection treatment, which goes beyond the usual edge processing, is done at the customer’s own responsibility and excludes any liability on the part of Interoptik.
Custom-made products
• All custom-made products and lens geometry orders outside the approved geometry range, are, due to their nature as individual production, which are not manufactured in the sense of series production, to be classified as custom-made products in the sense of Regulation EU 2017/745 (MDR). In this case, custom-made products are manufactured in accordance with the specifications of the regulation by the optician / ophthalmologist and the current state of science and technology and meet the basic safety requirements according to Annex I MDR and the applicable standard EN ISO 14889 (Ophthalmic optics – Spectacle lenses – Fundamental requirements for uncut finished lenses) as far as possible. Any risks arising from this are to be weighed up by the issuer of the prescription (optician / ophthalmologist) against the benefit for the wearer of the glasses and documented in the customer file.
Modifications of products
In order to adapt spectacle lenses individually to the customer’s needs, there are a number of order parameters (such as inset reduction, base curve request, adjustments of thickness reduction prisms or prisms etc…), which can change the performance of the lenses. This also includes the combination of different lens types in one pair of glasses. The use of these parameters, as well as the responsibility of an individual risk-benefit assessment tailored to the customer, is the responsibility of the user/optician.
Individual production or lens order according to sample
• Single and repeat orders of lenses are generally possible.
• White lenses with anti-reflective coating: Replacement of a single lens is possible. Depending on age, variations in the reflective colour must be tolerated.
• Coloured plastic lenses or self-tinted mineral and plastic lenses: Production is only possible in pairs. For individual orders, significant colour deviations must be accepted.
Care instructions
• Even though all spectacle lenses with premium coatings from Interoptik are basically finished in such a way that they can be cleaned with a standard microfibre cloth, Interoptik recommends cleaning the lenses under lukewarm running water with a pH-neutral cleaning agent, a diluted dishwashing detergent that does not have any refattening properties or a solvent-free spectacle care product. Spectacle lenses must not be cleaned with harsh household cleaners, solvent-containing liquids, organic solvents (acetone etc.), acids or alkaline solutions. For drying, Interoptik recommends a clean, fine-fibred microfibre or cotton cloth.
• Spectacle lenses should never be placed on the front of the lenses.
• A sturdy spectacle case is best suited for storage.
• Glasses should be protected from exceptionally high temperatures, such as those that can occur in a sauna or in a car parked in the sun.
• Influencing factors such as high blood pressure, diabetes, pregnancy, change of medication, etc. can lead to the lens no longer being optimally adjusted to the wearer of the glasses. In these cases, asthenopical complaints such as blurred vision, headaches, rapid fatigue and general malaise, reddening, pain and tears, occasional double vision, dizziness, feeling of heaviness in the eyelids may occur.
• Lenses with a centre thickness minimisation are delivered with sharp edges if necessary, there is a danger of cuts.
• With sharp-edged plus lenses or if the lens breaks during processing, there is an additional risk of cuts at sharp edges. The use of gloves (but do not use them when working with rotating tools – risk of accidents) helps here.
• Depending on the Abbe number of the lens material used, dispersion may cause disturbing colour fringes. The higher the refractive index, the thinner the lens can be and the lighter the glasses. At the same time, the lower the refractive index, the lower the dispersion in a prescription lens and thus the “colour fringes” at the edge of the spectacles, which are perceived as annoying.
• Plastic spectacle lenses are more break-proof than mineral spectacle lenses. Under unfavourable circumstances, plastic lenses can nevertheless break.
• Polarising lenses can cause problems with the readability of displays such as navigation systems, screens and head-up displays and therefore cannot be used without restrictions, e.g. for driving a car.
• The materials and layers of Interoptik and Aveo spectacle lenses have been tested for their toxic and allergenic properties and are classified as harmless for proper use according to EN ISO 14889. No allergenic materials are used in plastic spectacle lenses. However, in exceptional cases, special incompatibilities can lead to allergic reactions. The wearer of the glasses should clarify this with his family doctor and in doubt provide the manufacturer with these informations.
• Spectacle lenses must be disposed of in the residual waste. Intact spectacles can also be donated to charitable organisations, which will then distribute them to people in need of vision care worldwide.
• Dirty water and grinding residues resulting from the grinding of optical lenses must be disposed of properly (see instructions of the grinding machine manufacturers).
Interoptik is a private Romanian company, specialized in the development, production and distribution of high quality spectacle lenses.
