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First Author: A.Yusupov UZBEKISTAN
Co Author(s): S. Muhanov U. Muzaparov
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To estimate efficiency and appliance safety of LASIK in case of residual ametropia after extraction of cataract with IOL implantation.
SIHAT KOZ JV LLC, Tashkent, Uzbekistan
With the purpose to eliminate residual ametropia, LASIK was carried out for 23 patients (30 eyes) at the age from 45 to 62 years old (53.7 ±5.33). In past medical history, the cataract extraction with IOL primary implantation was carried out to all patients, 16 of which (69.6%) to one eye and 7 (30.4%) to both. Depending on residual ametropia after cataract extraction, patients were divided into groups: 1st group consisted of 13 patients (18 eyes) with myopia and compound myopic astigmatism, 2nd group consisted of 10 patients (12 eyes) with farsightedness and compound hyperopic astigmatism. Pre-surgical value of residual ametropia was ranging on spherical component from () 4.15ḟ0.94D to (+) 2.46ḟ0.65D, on cylindrical component from () 3.64ḟ0.15D to (+) 2.95ḟ0.78D, that made in spherical component of refraction in 1st group () 5.06ḟ0.85D, in 2nd group (+) 3.2ḟ0.45D. Besides conventional methods of survey, pre-surgical survey included aberrometry. Surgeries were carried out by standardized technique on VISX Star S4 IR (USA), the excimer-laser unit, with application of Amadeus II, the automatic micro-keratome (Switzerland) under local anaesthesia. Follow-up period after surgery made 12 months.
After surgery, value of spherical component made () 0.59ḟ0.34D and (+) 0.65ḟ0.07D, and correspondingly in both groups, and did not change significantly in further follow-up periods (1; 3; 6; 12 months). Before surgery, non-corrective visual acuity (NCVA) and under conditions of full spectacle correction (FSC), correspondingly, made in the 1st group 0.27ḟ0.09 and 0.82ḟ0.14, in the 2nd group 0.38ḟ0.07 and 0.81ḟ0.18. After LASIK, NCVA increased in 100% cases and made in the 1st group 0.79ḟ0.16, and in the 2nd group 0.78ḟ0.19. Average FSC in standard conditions made 0.86ḟ0.14 and did not differ in both groups. We did not observe complications in any of the cases during intra- and post-surgical period.
LASIK is safe, effective and highly predictable method of correction of residual ametropia of patients with pseudophakia which facilitates increasing in acuity of vision in 100% of cases and stabilizing of refraction for long time periods.