Certain eye conditions may make contact lens fitting and wear more challenging. Recent advances in design, manufacture and fitting techniques contribute towards the success rate when fitting many of these conditions.
Scleral contact lenses
These rigid lenses rest on the white sclera of the eye and vault over the cornea. In addition to providing a more stable fit, scleral lenses are often more comfortable than smaller hard lenses.
Hybrid contact lenses
Hybrid contact lenses are large-diameter lenses that have a rigid central zone, surrounded by a peripheral zone made of soft material. The purpose of this design is to provide the visual clarity of rigid lenses, combined with wearing comfort that is comparable to soft lenses.
Although both scleral and hybrid contact lenses were developed to particularly correct vision for patients with Keratoconus, they may be effective in other conditions, too. These include:
Giant papillary conjunctivitis
Contact lenses are highly successful when fitted to patients with Keratoconus. The lenses improve vision by optically replacing the irregular shape of the cornea with a smooth, uniform surface that enables light to form a sharper focus on the retina.