La cornea of the eye is one of the most important parts of the visual system. It is the first natural lens that allows the passage of light from the outside to the inside of the eye.
For the cornea to function properly, it must be transparent and have an adequate curvature. Patients with corneal conditionsand keratoconus, the anatomy of your cornea may be affected and require the use of therapeutic lenses.
What are therapeutic lenses and what are they for? Find out below at Área Oftalmológica Avanzada.
What are therapeutic lenses?
The cornea of the eye is a tissue made up of different layers that allow the passage of light from the outside to the inside of the eye.
The cornea is essential for the visual system to function properly, as it is responsible for two thirds of the eye's refractive power.
Various diseases can affect the cornea and compromise vision. The most common corneal diseases are:
- allergies, ulcers y erosions.
- Scars
- Alteration of the structure of the cornea due to different diseases such as keratoconus.
- dystrophy and corneal opacity.
- Fungal and bacterial infections.
When a patient presents with an alteration in the shape or function of the cornea, it may be necessary to prescribe therapeutic lenses to protect the ocular structure.
These lenses are slightly larger than conventional lenses. Its function is to minimize the effect of intense lighting, promote hydration of the eye and protect the cornea from further damage.
Protective contact lenses for the cornea is a widely used resource in patients suffering from keratoconus, a disease that causes thinning and progressive deformation of the cornea, and in patients recently operated on. PRK refractive surgery, to protect the cornea after the intervention.
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Today there are several types of therapeutic contact lenses and each of them has been designed for a certain corneal condition.
- RPG lenses are gas permeable, have a smaller diameter than the cornea and are characterized by being rigid. They are recommended for various corneal conditions and offer high-quality vision.
- Therapeutic lenses for patients with corneal edema They reduce contact with the cornea and improve inflammation. These lenses help release fluid that has accumulated in the tissue.
- Scleral lenses are made of the same material as RPG lenses, but have a larger diameter that allows them to address almost all conditions of the cornea.
- The contact lenses Ortho-K they are a type of RPG lens. These are recommended to temporarily relieve refractive errors such as myopia, farsightedness and / or astigmatism.
- Keratoconus lenses are more rigid and have a special geometry that allows to stop the deformation of the cornea. These lenses offer the patient a clear and comfortable vision.
What are they used for?
Therapeutic lenses are lenses that are prescribed to patients with corneal conditions with the aim of protecting and healing the ocular structure. The design of these lenses not only protects the cornea, but also helps the patient to recover their visual health.
Nowadays, a therapeutic lens model can be chosen for each corneal condition and for each particular case. This allows more and more people to find in protective lenses an alternative to lessen the consequences of diseases such as keratoconus.
