Abstract：
:The purpose of the study was to compare the accuracy of various biometric formulas for predicting postoperative refraction determined using applanation A-scan ultrasound. This retrospective comparative study included 485 eyes that underwent uneventful phacoemulsification with intraocular lens (IOL) implantation. Applanation A-scan ultrasound biometry and postoperative manifest refraction were obtained in all eyes. Biometric data were entered into each of the five IOL power calculation formulas: SRK-II, SRK/T, Holladay I, Hoffer Q, and Binkhorst II. All eyes were divided into three groups according to axial length: short (≤22.0 mm), average (22.0-25.0 mm), and long (≥25.0 mm) eyes. The postoperative spherical equivalent was calculated and compared with the predicted refractive error using each biometric formula. The results showed that all formulas had significantly lower mean absolute error (MAE) in comparison with Binkhorst II formula (P < 0.01). The lowest MAE was obtained with the SRK-II for average (0.49 ± 0.40 D) and short (0.67 ± 0.54 D) eyes and the SRK/T for long (0.61 ± 0.50 D) eyes. The highest postoperative hyperopic shift was seen with the SRK-II for average (46.8 %), short (28.1 %), and long (48.4 %) eyes. The highest postoperative myopic shift was seen with the Holladay I for average (66.4 %) and long (71.0 %) eyes and the SRK/T for short eyes (80.6 %). In conclusion, the SRK-II formula produced the lowest MAE in average and short eyes and the SRK/T formula produced the lowest MAE in long eyes. The SRK-II has the highest postoperative hyperopic shift in all eyes. The highest postoperative myopic shift is with the Holladay I for average and long eyes and SRK/T for short eyes.
journal_name
Int Ophthalmoljournal_title
International ophthalmologyauthors
Özcura F,Aktaş S,Sağdık HM,Tetikoğlu Mdoi
10.1007/s10792-016-0195-6subject
Has Abstractpub_date
2016-10-01 00:00:00pages
707-12issue
5eissn
0165-5701issn
1573-2630pii
10.1007/s10792-016-0195-6journal_volume
36pub_type
杂志文章abstract：PURPOSE:To assess safety and efficacy of deep topical anesthesia with ropivacaine-soaked sponge compared with topical anesthesia with oxybuprocaine in patients undergoing phacoemulsification. METHODS:This was a retrospective study where records of patients operated for cataract were evaluated. Patients using a visual ...
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更新日期：2019-12-01 00:00:00
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pub_type： 临床试验,杂志文章,随机对照试验
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journal_title：International ophthalmology
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