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First Author: T.Sherman UK
Co Author(s): J. Kwartz
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To ascertain whether visual quality of life is of an acceptable level following implantation of the enVista IOL after removal of cataract via phacoemulsification. Additionally Snellen acuity was also measured and the manufacturers A constant was optimised.
The ophthalmology department of Royal Bolton Hospital, Bolton, Greater Manchester, UK
The enVista(Bausch and Lomb) intra ocular lens was launched in 2011 for use in cataract surgery. It is marketed as being a glistening resistant hydrophobic acrylic aspherical IOL. To assess whether patients gained an acceptable postop visual quality of life, 24 patients Snellen visual acuity, visual quality of life as measured by the VF-14 visual quality of life questionnaire were obtained. The A constant was optimised using the optimisation software within the IOLmaster v5.4 (Carl Zeiss) for the SRKT formula, which was also used for the purpose of biometry. Surgery was carried out by Jeffrey Kwartz, consultant ophthalmologist and his registrar Irfan Khan.
75% of patients (n=18)achieved a visual acuity of 6/9 or better. 92% (n=22) of patients were within ḟ1D of target refraction. 17 VF-14 questionnaires were analysed, The mean score was 80 out of 100, with 65% (n=11) scoring over this amount. Furthermore, patients who scored less than 90 (n=8) had co existant pathology in 50% of cases. 6 patients scored the maximum 100 on the questionnaire. The A constant was optimised to 119.3 from the manufacturers 119.1.
The enVista IOL provides an acceptable postop visual outcome in terms of Snellen acuity, subjective visual quality of life as measured by the VF-14 questionnaire. The value of A constant optimisation is also underscored here by the notable difference post optimisation.