Contact lenses for everyday life, with reference to almost 90% of soft lenses, are good and reliable visual aids.
They have proven to be a good and reliable vision aid. Due to ever improving materials the tolerance is good, except of course for professions with a high dust exposure, such as plasterer, carpenter or the like, or in desert climates or extremely polluted parts of the world. In principle, contact lenses meet the highest cosmetic requirements because no glasses are worn. But sometimes glasses are superior to contact lenses. With strong visual defects (dioptres) lenses produce very large images, which is due to optical physics.
Lenses are not for everyone
With complex vision disorders, such as astigmatism and presbyopia, the use of lenses is very limited with the cost-benefit ratio dropping strongly.Lenses are not suitable for people with pre-existing corneal damage. Lenses are actually counter-productive as lenses always cause an oxygen deficiency, which stimulates the growth hormone for neovascularisation. This hormone is the main source of the problem, and the long-term consequences, such as irreversible surface damage, are often not properly understood or ignored by patients, who choose not to listen to advice. In this regard, hard lenses are more suitable. They rarely cause oxygen deficiency because of their small size. Hard lenses have the best visual performance of all vision corrections, including surgery. They offer patients the quickest and best relief in case of eye strain from lens wear. On top of that, they are the most cost-effective. However, the most significant short-coming is the wearing comfort. Hardly anyone accepts the long period of acclimatisation and the feeling of a foreign object in the eye.
Long-term lenses vs. daily lenses
Care products should not be used for soft lenses. Keyword: daily lenses. The contamination rate and the risk of infection of reusable lenses is over 5%. In case of an infection, long-term for the user is not uncommon. For fans of lenses, the marginally more expensive daily lenses are unrivalled and a blessing. However, all patients experience intolerance to soft lenses at some point. The point when this intolerance sets in, however, can vary greatly. The ophthalmologist usually makes the diagnosis acutely, even if repeated treatment or changing the lenses does not help.