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.

العنوان

international journal of keratoconus and ectatic corneal diseases

الناشر

Jaypee

بلد الناشر

الهند

نوع المنشور

Both (Printed and Online)

المجلد

8

السنة

2019

الصفحات

12-16