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Vienna 2018 Delegate Registration Programme Exhibition Virtual Exhibition Satellites 2018 Survey


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Central corneal stromal opacities accompanied by hyperopia and irregular astigmatism: two-step technology of clinical rehabilitation

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Session Details

Session Title: Surface Photoablation/PRK

Session Date/Time: Tuesday 25/09/2018 | 14:00-16:00

Paper Time: 14:58

Venue: Room A3, Podium 2

First Author: : N.Maychuk RUSSIA

Co Author(s): :    I. Mushkova   R. Makarov                 

Abstract Details


To assess clinical results of the optical rehabilitation in patients with central stromal corneal opacities accompanied by irregular astigmatism and hyperopia with two-step technology included clear lens extraction and IOL implantation with targeted myopic refraction followed by transepithelial topography-guided photorefractive keratectomy (TT-PRK)


Sv. Fyodorov Eye Microsurgery Federal State Institution, Department of Laser Refractive Surgery


Retrospective, not-comparative analysis of case series included 17 eyes with central corneal opacities up to 2/3 of stromal depth followed by irregular astigmatism and hyperopia. Examination before and 1 year postoperatively included Uncorrected Visual Acuity (UCVA), Best-spectacle Corrected Visual Acuity (BSCVA), efficacy, safety, accuracy, spherical and cylindrical components of the refraction, corneal topography (TMS 4, Tomey, Japan), Scheimpflug tomography (Pentacam Oculus, Germany) and optical coherence tomography (Avanti RTVue XR (Optovue, USA)) were performed in all patients. TT-PRK was performed at the excimer laser MicroScan-Visum 500 Hz and KeraScan software (both “OptoSystems”, Russia). Minimal calculated residual stromal thickness was 300 μm


Mean attempted spherical equivalent (SE) of refraction was 2.71±0.53D. Mean attempted cylinder was -4.71±0.92D. Postoperatively UCVA significantly increased from 0,16 ± 0,09 (range from 0,08 to 0,3) to 0,55 ± 0,09 (range from 0,4 to 0,7) and BSCVA from 0,42 ± 0,13 (range from 0,1 to 0,6) to 0,84 ± 0,17 (range from 0,6 to 1,0) (Р <0,001). No eyes have lost lines of BSCVA; 82.3% of eyes gained one or more lines. Mean deviation from the intended SE was 0.93±0.28D. 64.7% of eyes were within 0.5D of intended SE. No cases of postoperative ectasia or infectious recurrence were detected


Two-step technology of the clinical rehabilitation in patients with central stromal corneal opacities followed by irregular astigmatism and hyperopia showed high efficacy and safety with good results and allowed to avoid the necessity of keratoplasty

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