INVESTIGATION OF RESIDUAL REFRACTIVE ERROR AFTER CATARACT SURGERY IN PATIENTS BY PHACOEMULSIFICATION AT THE AN GIANG EYE - ENT- DENTAL HOSPITAL
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Abstract
Purpose: Survey of residual refraction after cataract surgery with monofocal intraocular lens implantation at 1 month, 3 months and 6 months, and analysis of some factors related to residual refraction results after surgery. Methods: Cross-sectional, descriptive, prospective study design. Convenient sampling of patients who had undergone cataract surgery with IOL placement. This study included 192 patients.Visual acuity, refractive errors and biometry of 192 eyes with cataract were evaluated before and one, three, sixth month after surgery. Refractive error and biometry measurements were performed with an autorefractometer and keratometry, A- Echo, respectively. SRK/T formula was used for IOL power calculation. We used paired T-test for analysis of data with normal distribution and nonparametric Wilcoxon test for the rest of data. P<0.05 was considered statistically significant. Results: The mean spherical refraction 0,4 ± 034D. Residual refraction (88%) after cataract surgery were within acceptable range (±1.00 D). Before and after surgery ,the mean values for corrected visual acuity were 1,55±0.8D and 0,07±0,07D (P<0.001) and The mean values for anterior chamber depth of the eyes was 3,03±0,43 mm before the surgery which changed to 4,23 ±0.16 mm after the surgery (P<0.001). Postoperative visual acuity was quite high, 100% of uncorrected visual acuity had <0.52L (>20/70), of which 96.8% had <0.15L (>20/30). Conclusions: The mean spherical refraction after phacoemulsification surgery had a relatively low value. Postoperative visual acuity was quite high. The axial length of the eyeball and the stiffness of the nucleus were correlated with the residual refraction.
Article Details
Keywords
Visual acuity; Phaco surgery; Residual refraction.
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