Scleral Versus Corneal RGP Contact Lenses in Irregular Cornea Disorders
Irregular; Contour of Cornea, Keratoconus, Pellucid Marginal Corneal Degeneration
About this trial
This is an interventional treatment trial for Irregular; Contour of Cornea focused on measuring Corneal rigid gas permeable contact lenses, Scleral rigid gas permeable contact lenses, Custom Scleral contact lenses, Keratoconus, Irregular cornea, Pellucid marginal degeneration, Post keratoplasty irregular cornea, Post refractive surgery irregular cornea, Traumatic irregular cornea
Eligibility Criteria
Inclusion Criteria:
- Diagnosis of keratoconus or related corneal irregularity
- Age 18 years to 69 years.
Exclusion Criteria:
- Good visual quality with soft contact lenses and or spectacles
Sites / Locations
- Central Middlesex Hospital
Arms of the Study
Arm 1
Arm 2
Experimental
Placebo Comparator
Scleral rigid gas permeable contact lenses
Corneal rigid gas permeable contact lenses
The experimental intervention is the Scleral Rigid Gas Permeable contact lens (SRGPcl), Zenlens™. These lenses are designed to bridge the cornea and fit in alignment with the sclera, thus avoiding any detrimental effects associated with corneal contact.
The control intervention is the RoseK2™ Corneal Rigid Gas Permeable contact lens (CRGPcl). Corneal lenses are considered the gold standard in the management of the visual disability due to keratoconus and other related irregular cornea disorders.