Posters

Epithelium-on photorefractive intrastromal cross-linking (PiXL) with supplemental oxygen for low hyperopic treatment in untreated Asian eyes

Poster Details

First Author: W.Lim SINGAPORE

Co Author(s):    J. Theng   M. Puah   C. Chua   F. Gasper   F. Khoo        

Abstract Details

Purpose:

To report the 6 months results of low hyperopic correction with epithelium-on PiXL with supplementary oxygen

Setting:

Eagle Eye Centre, Singapore

Methods:

PiXL procedure was conducted on patients with normal (non-ectatic) corneas for low hyperopic treatment. The PiXL treatment were designed to deliver a 9mm annulus ring of 1mm thickness (for hyperopic treatment) of UVA light with supplemental oxygen at a rate of 2mL/minute. Clinical evaluation included safety (BCVA, ECC, anterior ocular health) and efficacy (UCVA, manifest refraction, keratometric parameters) checks. 4 dominant eyes were treated for distance vision while 8 non-dominant eyes were treated for near vision. Questionnaires were conducted to analyse the patient’s subjective experience with the procedure during their 1st and 6th months post procedure review.

Results:

12 ametropic eyes (median +0.94DS; range -0.25 to +1.50D) of 8 subjects (mean age 48 years old; range 38 to 55) were assessed. 1-month data revealed a median refractive change of -0.44D (range -1.00D to -0.13D) and median Kmean steepening of 0.40D (range -0.2 to 0.8D). Median UDVA improved from 0.13 logMAR (range 0.04 to 0.20) pre-PiXL to -0.03 logMAR (range -0.04 to 0.04) at 1 month while median UNVA improved from N12 (range N6 to N18) pre-PiXL to N5 at 1 month.

Conclusions:

Early results of hyperopic PiXL with oxygen are encouraging especially with noticeable improvement in near vision. However, longer-term data to assess the sustainability of the treatment and larger studies are still required

Financial Disclosure:

research is funded, fully or partially, by a company producing, developing or supplying the product or procedure presented