Are hard contact lenses still useful?
With the invention of scleral lenses, corneal gas permeable lenses may seem like a thing of the past. However, corneal gas permeable lenses still remain a very effective option for many patients.
We have the pleasure of seeing a patient with keratoconus. He was used to wearing a corneal GP lens for keratoconus, and wanted to remain in the same lens modality. His lens was 5 years old, however the fit still looked ok. There were some scratches and deposits on the lens surface, and there was some excessive touch on the apex of the cone.
Patient’s habitual contact lens (unknown parameters)
Based on the topography, we decided to try the Rose K 2 lens. This corneal gas permeable lens is great for patients with nipple cones and oval cones. He falls into the mild/moderate category of keratoconus, so we thought this was a good lens to try first.
The topography shows a mild/moderate keratoconus with a nipple/central cone
Based on the fitting guide, we chose the base curve that we equal to his average K. The average K was 6.96mm so we selected the 6.9mm lens in the Rose K 2 fitting set.
When we placed the lens on the eye, it looked great! We were super happy with the fit and he was able to see 20/20 in this lens. Usually, we need to try several lenses on to get the perfect fit, but we really lucked out today! The lens was very well centered with good edge alignment. There is a very light feather touch on the apex of the cone, which is visible with the wratten filter.
The Rose K 2 lens was very well centered.
Stay tuned for his dispense!