Posters

Orthokeratology with a new contact lens design in hyperopia: a pilot study

Poster Details

First Author: A.Sánchez-García SPAIN

Co Author(s):    D. Piñero   L. Batres   H. Fukumitsu              

Abstract Details

Purpose:

To evaluate preliminarily the efficacy and safety of a new contact lens design for orthokeratology in hyperopia.

Setting:

Department of Optics, Pharmacology and Anatomy of University of Alicante, Spain and Department of Ophthalmology of Vithas Medimar International Hospital, Alicante, Spain.

Methods:

Prospective pilot study including 8 hyperopic eyes of 4 patients undergoing orthokeratology with the Alexa H contact lens (Tiedra Pharmaceutical, Madrid, Spain), which is an aspheric pentacurve design. Visual, refractive, corneal topographic and aberrometric changes were evaluated during a 1-month follow-up. Likewise, the presence of ocular surface alterations was evaluated by slit lamp biomicroscopy during this follow-up.

Results:

Hyperopia decreased significantly from a mean pre-fitting value of 2.94±0.95 D to 1.18±1.19 (p=0.01) and 0.25±0.85 D (p=0.04) at 1 week and 1 month of lens wear, respectively. Statistically significant changes were detected at 1 week of use of the lenses in keratometry (p=0.03), asphericity (Q) (p=0.01) and Zernike term for corneal spherical aberration (SA) (p=0.01). Likewise, the induction of a “toroid-like” topographic pattern leading to poor visual outcome and suboptimal correction was observed in 4 eyes at the beginning of the treatment. This condition was solved in all cases by reducing the lens diameter.

Conclusions:

The Alexa H lens seems to be useful for providing an orthokeratologic correction of hyperopia, with generation of increased negative Q and SA, and central steepening. These preliminary results should be confirmed in future studies, with evaluation of the long-term outcomes.

Financial Disclosure:

None