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Betsabe Urias, Regina Velasco, Oscar Fernandez, Alejandro Babayan, Oscar Baca; Contrast Sensitivity and Aberrometry in Patients with Phakic IOL. Invest. Ophthalmol. Vis. Sci. 2012;53(14):4050.
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To determine the contrast sensitivity and aberrometry tests in patients with high myopia after phakic IOL surgery and to estimate their visual satisfaction.
This is a prospective, cross-sectional study. We included all patients with unilateral or bilateral angle supported phakic IOL, with at least one month follow up. Exclusion criteria: patients who did not accept to participate in the study, patients with bioptic or combined procedure. Preoperative data was obtained from the clinical records. First, near and far uncorrected visual acuity was taken, then refraction with retinoscopy. Second, with their best possible spectacle correction the study of contrast sensitivity was taken monocular, near and far. The aberrometry was performed and finally, a standard questionnaire was applied to determine patient satisfaction. The data was analyzed using spreadsheets and SPSS 10.
A total of thirteen eyes of nine patients were included, initial far visual acuity was 20/600 or worse, with a postoperative improvement to 20/30. Preoperative spherical equivalent (SE) was -11.36 D, postoperative was +0.96 D. Postoperative contrast sensitivity was maintained within normal ranges in the 1.5, 3 and 6 spatial frequencies (SF), but in 12 and 18 SF there was a decrease in sensitivity. Aberrometry could only be performed in 10 eyes. High-order aberrations were found in 25.07% average, with a total RMS of 1.758 and a high order aberration RMS of 0.571. All patients referred to be satisfied with the visual outcome, only 1 patient complained about halos, 2 about having difficulty driving at night and 3 about photophobia.
In our patients we observed a significant improvement in uncorrected visual acuity. Their contrast sensitivity test is similar as the reported for high myopia. The percentage of high order aberrations was significant, but in our patients they were satisfied, and therefore their quality of life was better. We need a longer follow-up period and a larger group of patients, however, we believe that a angle supported phakic IOL is an excellent refractive alternative in cases of moderate to high myopia.
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