Surgical correction of high-degree myopia: choice of treatment and result analysis

Poster Details

First Author: A.Yusupov UZBEKISTAN

Co Author(s):    U. Muzaparov   I. Soliev   S. Muhanov   N. Habibulaeva     

Abstract Details

Purpose:

To evaluate the results of implantation of PIOL and ETL with implantation of IOL in high-degree myopia (more than 15.0 diopters).

Setting:

«SIHAT KO’Z» eye clinic

Methods:

In our clinic 68 patients (112 eyes) were under supervision. They included 48 women and 20 men that made 70.6% and 29.4%, respectively. Age of patients varied from 18 to 37 years old (averagely 25,4±6,8 years old). Preoperative refraction: spherical component from (-)10,5 diopters to (-) 23,0 diopters (averagely (-)17,5 diopters), cylindrical component from (-)0,5 to (-) 4,5 diopters (averagely (-) 1,5 diopters). Before surgery non-corrective visual acuity (NCVA) averagely made 0,07±0,03, corrective visual acuity (CVA) – 0,42±0,21. 32 patients were performed traditional implantation of posterior chamber PIOL on both eyes with single-step surgical corectomy in upper segment of iris or with previously held laser coloboma of iris. 20 patients (40 eyes) were performed ETL by method of ultrasound phacoemulsification with implantation of soft IOL. Along with this, several patients were performed combined intervention, so that 4 patients (8 eyes), due to initial opacities in cortical layers of lens, were performed ETL with implantation of IOL on one eye, and PIOL was implanted on paired eye. Implanting models of IOL " Acrysof IQ" (manufacturer – " ALCON" , USA), PIOL – RSK-3 (manufacturer – " NEP" , Russia). Focal power of implanting IOL varied from (-)3.0 up to (+)12.0 diopters, and PIOL from (-)3.0 up to (-)20.0 diopters.

Results:

Following was established during research after surgery. In group of patients of implanted PIOL, the NCVA after 1 month averagely made 0,55±0,23, that exceeded expected result of pre surgical CVA averagely to 30%, at this, post-surgical CVA made 0,65±0,32. None of cases revealed loss of corrective line. Refraction in 58 cases (85.3%), in patients with implanted PIOL, was desirable – emmetropic, on 7 eyes (10.3%) was weak myopic within the range of spherical component from (-)0.5 to (-)2.5 diopters and cylindrical from (-)0.5 to (-)1.5 diopters. Weak hypermetropical refraction was found only in 3 cases (4.4%), and averagely made (+)0.69±0.11. In patients ETL carried out with implantation of soft IOL, the emmetropic refraction was found in 84.1% cases (37 eyes) and on 7 eyes (15.9%) – weak myopic (with the range of spherical component from (-)1.0 to (-)3.5 diopters and cylindrical from (-)0.5 to (-)2.0 diopters).

Conclusions:

Thus, refractive surgeries with implantation of PIOL or IOL after ETL are effective and safe methods of correction of high-degree myopia, and allow achieving high clinical and functional effect in most patients (85%). This gives opportunity not only to get constantly high results of post-surgical refraction, but also to improve functions of visual system (averagely up to 30%). FINANCIAL DISCLOSURE?: No