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EW RESIDENTS 160 April 2016 4. Pereira FA, et al. Ultrasound biomicroscop- ic study of anterior segment changes after phacoemulsification and foldable intraocular lens implantation. Ophthalmology. 2003; 110:1799–806. 5. Norrby S. Sources of error in intraocular lens power calculation. J Cataract Refract Surg. 2008;34:368–376. 6. Canovas C, et al. Customized eye models for determining optimized intraocular lenses power. Biomed Opt Express. 2011;2:1649– 1662. 7. Abulafia A, et al. Intraocular lens power calculation for eyes with an axial length greater than 26.0 mm: Comparison of for- mulas and methods. J Cataract Refract Surg. 2015;41:548–556. 8. Abulafia A, et al. Prediction of refractive out- comes with toric intraocular lens implantation. J Cataract Refract Surg. 2015;41:936–44. 9. Ribeiro F, et al. Refractive error assessment: influence of different optical elements and current limits of biometric techniques. J Refract Surg. 2013;29:206–12. 10. Ortiz S, et al. Full OCT anterior segment biometry: an application in cataract surgery. Biomed Opt Express. 2013;4:387–396. 11. Grulkowski I, et al. Anterior segment imaging with Spectral OCT system using a high-speed CMOS camera. Opt Express. 2009;17:4842–4858. Contact information Taravati: taravati@uw.edu capsulorhexis size, and the amount of postoperative inflammation. In an age where patient expectations are at an all-time high and premium IOLs are being used more frequently, the prediction of postoperative lens position becomes increasingly im- portant. Modern lens formulas have attempted to predict the ELP more accurately, but can fall short due to lack of adjustment for preoperative differences. Studies such as this are important to further our under- standing of variation in postopera- tive results and to ultimately help us decrease the risk of postoperative refractive surprises. EW References 1. Nolan WP, et al. Changes in angle configu- ration after phacoemulsification measured by anterior segment optical coherence tomogra- phy. J Glaucoma. 2008;17:455–9. 2. Kucumen RB, et al. Anterior segment optical coherence tomography measurement of anterior chamber depth and angle changes after phacoemulsification and intraocular lens implantation. J Cataract Refract Surg. 2008;34:1694–8. 3. Memarzadeh F, et al. Optical coherence tomography assessment of angle anatomy changes after cataract surgery. Am J Ophthalmol. 2007;144:464–5. Review continued from page 159 stephensinst.com | +1.859.259.4924 Stephens Instruments | 2500 Sandersville Rd | Lexington KY 40511 USA Toll Free ( USA ) 800.354.7848 | Fax 859.259.4926 | info@stephensinst.com © 2016 Stephens Instruments. All rights reserved. LIFETIME WARRANTY 3 0 D A Y N O - R I S K T R I A L ISO 9001 ISO 13485 For more information visit us at ASCRS 2016 booth #1431 MICROSURE™ FEMTO TORIC S9-2070 S5-1535 ST5-7035 Stephens offers over 1,500 high-grade surgical stainless steel and titanium instruments, every one backed by a 30 day no-risk trial and lifetime warranty. You could pay more for your instruments, but why? Choose Stephens, trusted for over 40 years, and invest the savings in your practice—and your patients. The smart choice. Anterior chamber depth, iris and lens position before and after phacoemulsification in eyes with short and long axial length Maria Muzyka-Wozniak MD, PhD, Angelika Ogar, MS J Cataract Refract Surg (April) 2016;42. Article in press Purpose: To evaluate changes in anterior segment parameters after phacoemulsification in short and long eyes. Setting: Spektrum Eye Clinic, Wroclaw, Poland. Design: Prospective comparative study. Methods: Anterior segment parameters were examined before and after phacoemulsification in 3 groups of eyes: short (axial length (AL) <22 mm), normal (AL 22.5–25.0 mm) and long (AL >25.5 mm) with optical biometry and anterior segment optical coherence tomography. Results: The study included 20 short eyes, 22 normal eyes and 19 long eyes. Anterior chamber angle (ACA) increased after surgery in all eyes (p<.05). The relative change of anterior chamber depth (ACDrc) was larger in short eyes (57%) than in normal eyes (44%) or long eyes (42%) (p<.017). The change of the iris position after phacoemulsification was larger in short eyes than in normal or long eyes (mean change 0.93 mm; 0.7 mm; 0.43 mm, respectively) (p<.017). The change of the lens position after phacoemulsification in relation to the iris was smaller in short eyes (mean 0.51 mm) than in normal or long eyes (mean 0.82 mm and 1.1 mm, respectively) (p<.017). Conclusions: The relative change in ACD after phacoemulsification is larger in short eyes than in normal and long eyes. The largest change of the iris position occurs in short eyes. The largest change of the lens/IOL position occurs in long eyes, with the intraocular lens (IOL) moving back from the iris. Optical biometry may underestimate the postoperative ACD.

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