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Don R. Nixon; Evaluation Of The Post-implantation Stability Of The Tecnis 1-piece Intraocular Lens. Invest. Ophthalmol. Vis. Sci. 2011;52(14):6190.
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© ARVO (1962-2015); The Authors (2016-present)
To evaluate the centration and rotational characteristics of the Tecnis 1-Piece in vivo using a new technique to set the reference point at the time of surgery.
Prospective evaluation of 25 patients scheduled for Tecnis 1-Piece implantation. At the time of surgery, 2 marks were placed at the edge anterior capsule opening and the IOL positioned relative to these markings. At weeks 1 and 4, and months 3, 6 and 12 a dilated high resolution photos were taken. Using Adobe Photoshop software and comparing the current location with the final surgical image, relative centration and the exact rotation to 1 degree was determined.
After 3 months, the markings remain intact and are well inside the optic edge and appear to have no effect on the timing and symmetry of capsular closure. The mean rotation between surgery and Month 3 was 0.6 degree. The mean rotation between Day 1 and Month 3 was 1.0 degree.
This technique has value in both its simplicity and precision. Moreover, the ability to demonstrate rotational results is a feature that is necessary given the new FDA criteria for toric IOLs.
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