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A prospective, randomised comparison of single and three piece acrylic foldable intraocular lenses.

ABSTRACT: AIMS: To compare the postoperative performance of single and three piece acrylic foldable intraocular lenses (IOLs). METHODS: 20 patients underwent bilateral cataract surgery with a single piece SA30AL IOL in one eye and a three piece MA30BA IOL in the other eye. The eyes were randomly assigned to either a single or three piece lens. The amount of IOL decentration and tilt, area of anterior capsule opening, and degree of posterior capsule opacification were measured using the Scheimpflug anterior segment analysis system (Nidek EAS-1000). Visual acuity and contrast sensitivity were examined. Measurements were performed by masked examiners before and 1 day, 1 week, 1, 3, 6, and 18 months after surgery. RESULTS: There were no significant differences between the two groups (p>0.05, paired t test) in the amount of IOL decentration, IOL tilt, area of anterior capsule opening, degree of posterior capsule opacification, best corrected visual acuity, and contrast sensitivity throughout the 18 month follow up period. CONCLUSION: The single and three piece acrylic foldable IOLs are equally stable in the eye after surgery.

SUBMITTER: Nejima R

PROVIDER: S-EPMC1772204 | biostudies-other | 2004 Jun

REPOSITORIES: biostudies-other

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Project description:BackgroundImplantation of a single-piece-acrylic intraocular lens (SPA-IOL) in the ciliary sulcus during phacoemulsification complicated with posterior capsule tear (PCT) may be associated with severe complications. The purpose of this study was to report the efficacy and safety of sulcus implantation of a SPA-IOL, designed for both in-the-bag and sulcus positioning.MethodsA prospective cross-sectional study including 12 patients, who underwent phacoemulsification with PCT and sulcus implantation of SPA-IOL designed for both in-the-bag and sulcus positioning (Seelens AF, Hanita, Israel) between January 2009 and March 2012 (follow-up 12-37 months). Preoperatively corrected distance visual acuity (CDVA), subjective refraction and intraocular pressure (IOP) were recorded. Postoperative evaluation included anamnesis for IOL edge symptoms and transient visual obscurations (TVO) along with CDVA, subjective refraction IOP, anterior segment biomicroscopy, gonioscopy, assessment of IOL centration, fundus biomicroscopy and spectral-domain optical coherence tomography of the macula.ResultsPreoperatively, mean CDVA was 0.84 ± 0.60 LogMAR (Counting Finger-20/33) improving to 0.18 ± 0.13 LogMAR (20/40-20/20) at last examination (p = 0.004), as all the patients gained better CDVA. Mean preoperative spherical equivalent was -0.2 ± 2.5 Diopter (D) (-4.0D to +5.4D) reaching -1.9 ± 0.9 (-4.0D to -0.6D) at last examination (p = 0.12). Mean preoperative refractive astigmatism magnitude was 1.0 ± 0.6D (0.3D to 2.3D) changing to 1.1 ± 1.0D (0.0D to 3.0D) at last examination (p = 0.88). Mean preoperative IOP was 14.7 ± 3.2 mmHg (11-23 mmHg) without medications reaching 15.9 ± 3.3 mmHg (10-21 mmHg) at last follow up (p = 0.21). Postoperatively one patient required two medications for IOP control in his study and contralateral eyes. None of the patients had symptoms of IOL edge or TVO. There were no intraocular hemorrhages, inflammatory reactions, or pigment dispersion and the IOLs were well centered in all cases. Central foveal thickness was 280 ± 33 ?m (193-310 ?m).ConclusionsAppropriately designed SPA-IOL may be implanted in the ciliary sulcus during phacoemulsification with PCT rather than switching to another backup IOL demanding wound enlargement.

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A prospective, randomised comparison of single and three piece acrylic foldable intraocular lenses.

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