By Thomas Kohnen (Editor), Douglas D. Koch (Editor)
The second one quantity of "Cataract and Refractive surgical procedure" within the necessities in Ophthalmology sequence presents new info on cataract and refractive surgical procedure. The chapters speak about new suggestions and expertise. The emphasis is on parts which are speedily evolving and necessary to refined scientific perform. The e-book has a well-structured textual content and layout, and is fast and straightforward to learn. It bridges the space among fundamental literature and day-by-day perform. This booklet may help clinicians give you the top effects for his or her cataract and refractive surgical sufferers and is additionally crucial for non-stop schooling and complicated education.
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Additional resources for Cataract and Refractive Surgery 2006 Edition (Essentials in Ophthalmology)
2). By using an IOL materialspecific conversion factor (CF), a corrected axial length factor (CALF) can be determined using: CF = 1 – (VE/VIOL) CALF = CF × T where VE = sound velocity being used (such as 1,532 m/s), VIOL = sound velocity of the IOL material being measured, T = IOL central thickness. By adding the CALF to or subtracting it from the measured axial length, the true axial length is obtained. Another source of axial length error is that the ultrasound beam has a larger diameter than the fovea.
If they are too anterior this will pull the iris up and result in difficulty in insertion of the phaco tip and problems with flow. It is not necessary to enlarge the pupil maximally. This can lead to postoperative pupil irregularity and dysfunction due to permanent damage to the iris. The pupil should therefore be opened only to the point that is comfortable for the surgeon to complete safe phacoemulsification (Fig. 6). To make the sub-incisional phaco insertion easier and decrease the likelihood of iris damage, Oetting designed a diamond-shaped configuration of the iris hooks (Figs.
The 27G needle is inserted through the scleral wall to pass in front of the IOL loop. c A ring suture is created around the IOL haptic. A similar procedure is carried out on the opposite side. d Final position of the IOL. The knots are buried and no scleral flaps are needed. The entire procedure was performed through two paracenteses and four needle holes outside the capsular bag . The “closed system scleral fixation technique” is performed through external incisions no bigger than two paracenteses and four needle holes (Fig.