Research Article
Volume 12 Issue 8 - 2021
A New Intra-Operative Tool for Toric IOL Alignment during Cataract Surgery
Meena Kumari Ramesh* and Ramesh Rajasekaran
Mahathma Eye Hospital Pvt Ltd, Tennur, Tiruchirappalli, Tamilnadu, India
*Corresponding Author: Meena Kumari Ramesh, Mahathma Eye Hospital Pvt Ltd, Tennur, Tiruchirappalli, Tamilnadu, India.
Received: July 07, 2021; Published: July 31, 2021


Purpose: To compare a novel intra-operative keratometry diagnostic technique to pre-operative manual marking technique (manual pre-operative reference marking and intra-operative axis marking) of toric intraocular lens alignment during cataract surgery.

Design: It is a retrospective study designed to identify and analyze differences between intra-operative digital marking system and pre-operative manual marking for steep meridian location on the anterior corneal surface. No randomization and masking were applied as all eyes were measured with both methods.

Methods: Patients with pre-existing corneal astigmatism planned for cataract surgery were selected between age 60 - 80 years. Exclusion criteria were inability to fixate due to any ocular pathology, patients who received retro or peribulbar block, and patients with any corneal pathology (Fuchs’, EBMD, keratoconus, advanced pterygium, dry cornea), or amblyopia with inability to fixate. All patients were performed cataract surgery with pre-planned toric IOLs and aligned based on the axis indicated by Lenstar 900 (Haag-Streit AG). Sirius topographer (CSO) was used to confirm angle of astigmatism pre-operatively. Each eye was also measured intra-operatively with Polaris Keratoscope (Keen Sight, Inc.).

Results: 10 eyes were included. A large positive linear correlation was found between preoperative manual reference marking and intra operative axis marking as compared with Polaris Keratoscope (r = 1.025, R2 = 0.985) with one outlier (> 3σ).

Conclusion: Polaris Keratoscope was found to be a useful and reliable new toric IOL alignment digital tool in the arsenal of cataract surgeons.

Keywords: Toric IOL; Intra-Operative Diagnostics; Cataract Surgery; Biometry; Astigmatism; Aberrometry


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Citation: Meena Kumari Ramesh and Ramesh Rajasekaran. “A New Intra-Operative Tool for Toric IOL Alignment during Cataract Surgery”. EC Ophthalmology 12.8 (2021): 38-44.

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