Purpose:
Keratoconus is a degenerative, ectatic corneal disorder. Recently, corneal crosslinking (CXL) as a stabilizing procedure has been
combined with other procedures to improve visual and refractive outcomes as in Athens and Cretan protocols. The aim of the study is to present
the efficacy and safety of a modified Athens protocol over 1-year follow-up.
Materials and methods:
The study is a retrospective descriptive one with a total of 43 eyes (36 patients) with progressive keratoconus who
underwent combined transepithelial phototherapeutic keratectomy (PTK), partial wavefront-optimized photorefractive keratectomy, and
corneal collagen CXL. Visual, refractive, pachymetric and keratometric preoperative and postoperative follow-up data at 1 month, 3 months, 6
months, and 1 year were taken from patients’ medical records.
Results:
The mean uncorrected distance visual acuity (UDVA ) improved from (0.33
±
0.19) preoperatively to (0.64
±
0.27) at 1 year postoperatively
and the mean corrected distance visual acuity (CDVA) from (0.62
±
0.21) to (0.80
±
0.20). At 1-year postoperative visit, the mean spherical and
cylindrical values changed significantly from (
−
2.10
±
2.45) to (
−
0.34
±
2.26) and from (
−
3.50
±
1.85) to (
−
1.23
±
1.02), respectively. The mean
steep and flat
K
readings significantly decreased from (50.97
±
4.46) to (47.58
±
5.61) and from (47.08
±
4.02) to (44.84
±
4.47), respectively.
The mean
K
max
also decreased from (56.27
±
6.40) preoperatively to (51.22
±
7.94) postoperatively. The thinnest corneal thickness mean was
(462.49±36.17 μm) preoperatively and (388.21 ±56.64 μm) postoperatively.
Conclusion:
Our modified Athens protocol has shown to be safe and efficacious in the management of progressive keratoconus. Impressive
improvements in visual, refractive, and keratometric values were noted. This approach offers a more tissue saving protocol than the original
Athens protocol with less alteration to the surface of the cornea, which may offer more predictability and less refractive surprises.