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Int J Ophthalmol. 2016 May 18;9(5):703-6. doi: 10.18240/ijo.2016.05.11. eCollection 2016.

Comparison of two different methods of preoperative marking for toric intraocular lens implantation: bubble marker versus pendulum marker.

International journal of ophthalmology

Javed Hussain Farooqui, Archana Koul, Ranjan Dutta, Noshir Minoo Shroff

Affiliations

  1. Cataract and IOL Services, Shroff Eye Center, New Delhi 110048, India.

PMID: 27275425 PMCID: PMC4886884 DOI: 10.18240/ijo.2016.05.11

Abstract

AIM: To compare the accuracy of two different methods of preoperative marking for toric intraocular lens (IOL) implantation, bubble marker versus pendulum marker, as a means of establishing the reference point for the final alignment of the toric IOL to achieve an outcome as close as possible to emmetropia.

METHODS: Toric IOLs were implanted in 180 eyes of 110 patients. One group (55 patients) had preoperative marking of both eyes done with bubble marker (ASICO AE-2791TBL) and the other group (55 patients) with pendulum marker (Rumex(®)3-193). Reference marks were placed at 3-, 6-, and 9-o'clock positions on the limbus. Slit-lamp photographs were analyzed using Adobe Photoshop (version 7.0). Amount of alignment error (in degrees) induced in each group was measured.

RESULTS: Mean absolute rotation error in the preoperative marking in the horizontal axis was 2.42±1.71 in the bubble marker group and 2.83±2.31in the pendulum marker group (P=0.501). Sixty percent of the pendulum group and 70% of the bubble group had rotation error ≤3 (P=0.589), and 90% eyes of the pendulum group and 96.7% of the bubble group had rotation error ≤5 (P=0.612).

CONCLUSION: Both preoperative marking techniques result in approximately 3 of alignment error. Both marking techniques are simple, predictable, reproducible and easy to perform.

Keywords: bubble marker; pendulum marker; toric intraocular lens

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