A 29 year-old gentleman was referred to our clinic by a local LASIK surgeon, who declined to perform LASIK on him because of irregular corneal topographies. Our examination revealed an obvious case of moderate keratoconus in the right eye and mild keratoconus in the left.
His unaided visual acuities were 20/60 in the right eye and 20/30 in the left. With 4.50 diopters of astigmatism in the right eye and 2.00 diopters in the left, he was correctable to 20/30 in the right eye and 20/20 in the left with spectacles. LASERFIT lenses with standard optics to correct the lower order aberrations resulted in only 20/30 in the right eye. A LASERFIT lens with wavefront-guided optics improved the quality of vision in his worse right eye to 20/15, while the left eye could identify 20/10 letters. Results like this are not uncommon with our LASERFIT process and patent-pending wavefront design.
The table shows how much the higher order aberrations were improved with standard optics and then with wavefront-guided optics. The LASERFIT process with wavefront-guided optics typically results in an additional reduction of the higher order aberrations in the range of 30-70% and improvements in visual acuity averaging 1 – 2 lines over conventional optics.
| OD | Total HOA(µ) (% change) |
Coma(µ) (% change) |
Sph. Ab.(µ) (% change) |
Trefoil(µ) (% change) |
|
| Unaided | 3.216 | 2.818 | 0.378 | 1.246 | |
| STD optics | 0.790 (-75%) |
0.678 (-76%) |
0.124 (-67%) |
0.251 (-80%) |
|
| WF-guided optics | 0.436 (-45%) |
0.260 (-62%) |
0.059 (-52%) |
0.225 (-10%) |
|
| OS | Unaided | 0.548 | 0.433 | 0.041 | 0.251 |
| STD. Optics | 0.351 (-36%) |
0.299 (-31%) |
0.031 (-24%) |
0.135 (-54%) |
|
| WF-guided optics | 0.135 (-61%) |
0.074 (-75%) |
0.028 (-10%) |
0.013 (-90%) |
