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J. M. Herreras, V. de Juan, I. Perez, A. del Rio, A. Morejon, I. Fernandez, R. Martin, G. Rodriguez; Factors Determining Refractive Error and Stabilization After Cataract Surgery. Invest. Ophthalmol. Vis. Sci. 2010;51(13):5401.
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To determine the influence of preoperative or intraoperative factors in the amount and stabilization of the refractive error after uncomplicated cataract surgery.
Random effects model was used to identify the relationship between some preoperative factors [age, lens opacity determined by LOCS grading scale, anterior chamber depth determined by Orbscan II topography, IOLMaster biometry and Otiscan-1000 biometry] or intraoperative factors [surgical technique, ultrasound time, aspiration time and flow rate] and the amount of sphere refractive error after surgery. This study included 5 follow up visits: at 24 hours (V1), 1st (V2), 2nd (V3), 3rd (V4) and 4th (V5) week. The stabilization of sphere refractive error was analyzed by MANOVA.
74 eyes of 45 patients, 64.4% female, mean age 65.11±13.55 years were analyzed. Five factors were identified to significantly determine postoperative sphere refractive error: age (p<0.001), nuclear opacity (p=0.0361), anterior chamber depth (p=0.0039 with Orbscan, p=0.0023 with IOLMaster, p=0.0032 with Otiscan-1000), aspiration time (p=0.0456) and flow rate (p=0.0024). We found a directly proportional relationship between final spherical refraction with all factors except with anterior chamber depth that showed an inversely proportional relationship. However, only age was related with early refractive stabilization (p=0.0330), finding a less refraction change between visits in older patients.
There are preoperative factors that may influence the refractive outcome and stabilization. This information could be useful to surgeon to improve the information given to patients before surgery.
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