Cataract and Refractive Surgery: Progress III (Essentials in by Thomas Kohnen, Douglas D. Koch

By Thomas Kohnen, Douglas D. Koch

The necessities in Ophthalmology sequence represents readership recognition of the 1st sequence, each one of an distinct updating booklet at the growth in all 8 volumes. this can be a good fortune that used to be made p- subspecialties of ophthalmology. sible predominantly via the various opinion-leading In a quarterly rhythm, 8 matters are released authors and the exceptional part editors, in addition to overlaying clinically suitable achievements within the entire with the positive help of the writer. There box of ophthalmology. This well timed move of enhance- are many sturdy purposes to proceed and nonetheless enhance ments for the absolute best care of our eye sufferers has the dissemination of this didactic and clinically r- confirmed to be potent. The preliminary operating speculation of evant info. supplying new wisdom instantly following p- lication within the peer-reviewed magazine and never ready G.K. Krieglstein for the textbook seems to be hugely viable. R.N. Weinreb we're now coming into the 3rd cycle of the necessities sequence Editors in Ophthalmology sequence, having been inspired through September 2008 Preface we're happy to proportion with our readers this 3rd uncorrected and, in a single example, corrected imaginative and prescient. variation of Cataract and Refractive surgical procedure, below subject matters in corneal refractive surgical procedure contain disc- 3 years from booklet of the second one variation. sion of the administration of upper order aberrations The dramatic velocity of switch in cataract and refractive and corneal approaches for treating presbyopia.

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At about the same time, Nagamoto independently presented the concept of using an open ring made of rigid poly (methyl methacrylate) (PMMA) in order to maintain the circular ■ ■ ■ ■ ■ and avoids fibrotic whitening and contraction of the anterior capsule leaf Foldable closed rings allow for easy implantation and circumferential capsular bending, but require additional anterior capsule polishing Generally, a capsular ring should be implanted into the evacuated capsular bag following thorough cortex fibre aspiration Though use of an injector is more convenient, bimanual implantation minimizes capsular deformation and zonular stress and the risk of capsular entanglement Sizing the anterior capsulorhexis so as to only barely overlap the optic counteracts excessive capsular bag shrinkage especially with PEX With PEX, progressive zonular failure often occurs: timely suture-fixation of a CTR avoids consecutive luxation of the CTR-IOL-bag complex contour of the capsular bag and thus avoid deformation or decentration of soft intraocular lenses [2].

J Cataract Refract Surg 33(4):618–22 References 13. Kurz S, Krummenauer F, Gabriel P, Pfeiffer N, Dick HB (2006) Biaxial microincision versus coaxial small-incision clear cornea cataract surgery. Ophthalmology 113:1818– 26 14. Tanaka T, Koshika S, Usui M (2007) Cataract surgery using the bimanual phacoemulsification technique with an Accurus system and Mackool microphaco tip. J Cataract Refract Surg 33:1770–4 15. Elkady B, Alió JL, Ortiz D, Montalbán R (2008) Corneal aberrations after microincision cataract surgery.

1d). To ease implantation, the hook was positioned 90° away from the trailing ring opening. Thus, threequarters of the ring are already inserted before the hook enters the eye, thereby reducing the risk of entanglement. For large zonular defects with intact residual zonules, a condition which may apply to Marfan’s syndrome, a standard ring is preferably implanted after thorough a Fig. 4 (a) Left: Koloboma CTR shielding a large surgical koloboma. Right: Two multi-segmented CTRs implanted to remedy congenital aniridia.

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