Keratoconus is a non-inflammatory, progressive eye condition which causes thinning of the cornea, the front surface of the eye. This causes the cornea to protrude forward, developing an irregular ‘cone’ like shape, which can lead to significant visual distortion.
In the early stage of keratoconus, where the degree of irregularity is mild, spectacles may be appropriate. In these cases, soft contact lenses may be an option. As the keratoconus becomes more pronounced and the cornea becomes more distorted, these options may be inadequate for correcting vision.
Once keratoconus reaches this level – rigid gas permeable (RGP) contact lenses or similar are required. Traditionally, keratoconus has been managed with corneal RGP lenses, which are lenses which fit within the cornea, i.e. are smaller than the coloured part of the eye.
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