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Ortho-K contact lenses (night lenses)

Ortho-K contact lenses (also called Ortho-K lenses) can be certain Poor eyesight correct in sleep. This means that it is no longer necessary to wear glasses or contact lenses during the day. Since they are only used at night, they are also called Night lenses. However, in order for sharp vision to work reliably in this way, a specially trained contact lens expert has to adapt the contact lenses individually to each eye.

What are Ortho-K lenses (night lenses)?

The orthokeratological contact lens (Ortho-K lens) is a special dimensionally stable lens that models the cornea while sleeping. To do this, it exerts light and targeted pressure on the flexible cornea. This change in shape persists throughout the day and enables sharp vision without any further visual aid. The night lenses can compensate for ametropia such as mild to moderate myopia through this function.

Ortho-K lenses - application

In order for the contact lenses to adequately shape the cornea, they must remain in the eye for about six to eight hours while sleeping. The corrective effects can then last up to 16 hours, in some cases even longer, depending on the severity of the nearsightedness.

Since the effect is temporary, the lenses must be worn every night. Otherwise the cornea will return to its original state and the old ametropia will return. For your own safety, you should always have a pair of daily lenses of the right strength at hand, because eyesight can decrease over the course of the day, even with regular use.

Wear Ortho-K contact lenses when you have a cold?

If you have a cold, users should avoid using lenses that sculpt the cornea. It should be noted that the deformation of the cornea slowly regresses, but not immediately. On the one hand, this means that a different visual aid is necessary, on the other hand, it takes a few days for the strength of the usual glasses to fit. As long as daily lenses in different strengths can be helpful. If you have a severe cold, however, it is advisable to avoid contact lenses altogether and instead allow yourself to go to bed.

Interested parties can expect costs of 600 euros or more when buying night lenses. After all, individual adjustments and regular follow-up examinations by a contact lens specialist for orthokeratological lenses are essential. For the first few days, the optician or ophthalmologist also provides daily lenses in decreasing strength. Because it takes some time for the night lenses to achieve optimal visual acuity. Due to signs of wear and tear, the lenses must be replaced once a year. The costs for the new night lenses can then be slightly lower.

Health insurance will cover the costs

As with other contact lenses, the costs of night lenses are not covered by the health insurance of those with statutory health insurance. However, at least a partial reimbursement is possible with an appropriate supplementary insurance. For privately insured persons, depending on the tariff, it can be worthwhile to submit a cost estimate for the night lenses to the health insurance company.

Ortho-K lenses - disadvantages and limitations

The Ortho-K lens cannot correct every ametropia. In addition, the eyes must be healthy and produce enough tear fluid - so nothing for dry eyes. The night lenses are also unsuitable for diabetics and rheumatics. If, from a medical point of view, nothing speaks against wearing night lenses, restrictions can still arise. For example, some users see circles of light around light sources or perceive contrasts more poorly in the dark. In addition, the effect is only temporary. If the contact lens wearer forgets to put them on overnight or if they have to temporarily fail to wear them for other reasons, clear vision during the day is no longer guaranteed.

Are Ortho-K lenses suitable for children?

Night lenses are generally suitable for children. However, a specially trained contact lens expert must decide on each individual case. Night lenses have an additional benefit for children. Because wearing Ortho-K contact lenses can prevent myopia from increasing or at least progressing more slowly.

For which poor eyesight are Ortho-K contact lenses suitable?

Ortho-K contact lenses can Myopiauntil about -4.5 diopters and Astigmatism correct up to about 2.5 diopters. The exact limit always depends on the individual properties of each cornea. Furthermore, special night lenses can also compensate for presbyopia. On the other hand are the Ortho-K lenses Farsightedness not suitable.

Buy Ortho-K lenses online?

He then needs special equipment to measure the eyes. The adjustment takes several days and must be done strictly under the control of the optician or ophthalmologist. The contact lens expert also explains the correct handling and care of contact lenses. If the lenses fit well and correct the ametropia satisfactorily, a follow-up check should be carried out every three months. An online purchase can only replace this competence in a roundabout way.