Keratoconus is an eye disease that usually begins in the teenage years, becoming more active between 20 and 30, and then more dormant from the age of 40. It always displays secondary symptoms such as allergies, short-sightedness, or astigmatism. The Cornea develops into a conical shape leading to a dilution of the central corneal area and reduced vision
There are several ways to treat the condition including glasses, hard gas permeable contact lenses (e.g.,FlexCone); soft contact lenses, (e.g.HydroCone); surgical procedures (e.g. grafting and corneal transplant) and Corneal collagen crosslinking with riboflavin.
At the beginning it often only effects one eye, however over the medium term the second eye follows. Most frequently it effects only the central region of the cornea, a linear ethiopathology can’t be proved. Males suffer Keratoconus more than females (ratio 2:1)
Often, a person who has keratoconus is Myopic, and in addition to the Myopia the cone-shaped distortions also creates irregular astigmatism. With glasses this ametropia is often not possible to correct 10/10.
A solution that avoids these problems and can greatly improve quality of life are soft HydroConecontact lenses, lenses specifically designed for all levels of Keratoconus.
- Frequent refractive changes
- Increase of astigmatism
- Advanced Keratoconus can be determined with a horizontal observation of the eye
Possible causes for keratoconus:
- Genetic imprinting
- Metabolic reasons
- Weak collagen corneal connective tissue
- Frequent eye-grating can increase the chances of keratoconus
- Fissure in the cornea, Corneal thinning
- Thinning of cornea after Lasik
Although the condition of Keratoconus has been recognised for over 200 years, an unequivocal cause has not yet been defined Keratoconus progression and relative corrective progression Relatively smooth divergence between the central and peripheral corneal topography.
Alternatives to stabilise the corneal surface:
Crosslinking: A modern alternative to stabilise the cone
Intacs: 2 plastic parts are implanted into the cornea to decrease the irregularity.
(Table Grades 1-4) Amsler-Krumeich keratoconus classification
After affects with Keratoconus
- Enduring red eye
- Dazzling and glare
- Depleted facial muscles
- Streaking effects
- Decreased vision at twilight and at night
- Dry eye and hypersensitivity
- Decreasing comfort/tolerance of contact lens wear especially over longer periods of wear (e.g. they slip or even drop off the eye)
- Decreased tear-quality
Kontaktlinsen bei Keratokonus
Traditionally, rigid gas permeable lenses are prescribed to patients with keratoconus, however soft alternatives now exist offering greater comfort and potentially longer wearing times. These soft lenses are manufactured in modern materials such as Silicone Hydrogel and are individually made to the patient’s requirements, optimising fit and vision. They can also offer the patient the option of occasional wear for hobbies and sports activities.
- HydroCone: Soft contact lenses for keratoconus stages 1-4
- HydroCone P: Soft contact lenses for keratoconus stages 1-4 with the additional correction of presbyopia
SwissLens also offers conventional rigid gas-permeable contact lenses for keratoconus: