Posters

Corneal morphology and visual outcomes in LASIK patients after orthokeratology and soft lens wear: a pilot study

Poster Details

First Author: A.Queirós Pereira PORTUGAL

Co Author(s):    C. Villa Collar   A. Amorim-de-Sousa   B. Gargallo   A. Ramon Gutierrez   J. Gonzalez-Meijome        

Abstract Details

Purpose:

To compare the corneal morphology and visual outcomes of long-term soft and orthokeratology (OK) lens wearers undergoing corneal refractive surgery (LASIK) surgery for myopia correction.

Setting:

Novovision Ophthalmology Clinic, Madrid, Spain.

Methods:

Sixteen (16) myopic patients wearing hydrophilic soft contact lens (SCL, n=8 subjects) and OK (n=8 subjects) undergoing LASIK were retrospectively evaluated. Pachymetry parameters, volume corneal topography, elevation of anterior and posterior surface and the anterior surface aberrometry of the cornea Pentacam (Oculus, Inc. GmbH, Wetzlar, Germany) before the LASIK procedure were recorded and after one year of the same. Measurements were obtained in the 8mm central horizontal meridian at intervals of 1 mm.

Results:

Age, refractive error and topographic parameters before LASIK did not showed statistically significant differences between the two study groups. LASIK post-treatment results showed identical changes in both control and OK groups and did not show significant differences in all the parameters evaluated. The changes on corneal parameters and HOA due to refractive surgery intervention were not different between Control_LASIK and OK_LASIK (p>0.073, Independent Sample Test / U de Mann-Whitney test).

Conclusions:

Corneal changes due to OK treatment are reversible after its discontinuation. The present study gives an overview of how OK does not impair future LASIK surgery for the correction of myopia and do not influence the success/results of such intervention. This study results may suggest that corneal biomechanics it is not compromised and weakened by OK CL wear, not making posterior LASIK refractive surgery possible. Although this is a pilot study and there is a need of evaluate this results/changes in future studies.

Financial Disclosure:

NONE