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With keratoconus, the deformed cornea means glasses often end up no longer being enough: vision stays blurred despite correction. This is where custom-fitted contact lenses come in — in many cases, they make it possible to regain clear, comfortable vision.
Why are glasses no longer enough?
Keratoconus gives the cornea an irregular shape. Glasses correct “regular” vision, but not this irregularity. Rigid lenses, on the other hand, recreate a smooth optical surface in front of the eye — hence often much better vision.
Which types of lenses for keratoconus?
- Rigid gas-permeable lenses : placed on the cornea, they “smooth out” the irregularity and provide sharp vision.
- Scleral lenses : larger, they rest on the white of the eye and “vault over” the cornea. Often more comfortable and very useful in advanced forms.
- Hybrid lenses : a rigid center for sharpness, a soft edge for comfort.
The right choice depends on the stage, the shape of the cornea and each person’s tolerance.
Fitting: a key step
Fitting a keratoconus lens is not automatic: it is bespoke work, with trials and precise measurements (often guided by corneal topography) and specific expertise. A well-fitted lens means good vision and good comfort, without damaging the cornea.
And follow-up?
Keratoconus can progress: regular check-ups make sure the lens remains suitable and the cornea is stable.
Key takeaway
If your glasses no longer give you satisfactory vision because of keratoconus, well-fitted rigid or scleral lenses can change your daily life. The key: careful fitting and regular follow-up.
Dr Hassan Oulehri, ophthalmologist in Fez, Morocco, carries out keratoconus assessment and contact lens fitting. To learn more or book an appointment: WhatsApp or 0615 55 71 41. See also: recognizing the signs of keratoconus.