Abstract
Purpose: To evaluate the effectiveness of a surgical device that intented to help in the preparation of the anterior capsulorhexis analyzing the design and shape, comparing with capsulorhexis made by free hand. Methods: Three ophthalmology residents(R3) at the HUOL and one surgeon in training, participate in this research as volunteers. Each surgeon perform 5 capsulorhexis in porcine eyes using the device, and five others by free hand as a control. All capsulorhexis were photographed having a ruler as reference to guide and calibrate a computer application for morphometric evaluation (Cambui Labs, Natal, Brazil). All surgeons aimed to produce a circular continuous capsulorhexis of 5 mm diameter that represents 15,7mm in perimeter and 19,652mm2 in area. Each wet-lab capsulorhexis was evaluated in regard to these criteria: diameter (mean, maximum and minimum), perimeter, area, deviation from the ideal diameter and ideal shape. Results: Compare to control groups, capsulorhexis with the aid of the surgical device showed: 5,44mm ±0,89 vs 6,37mm ±0,67, for capsulorhexis diameter (p=0,001); 17,52mm ±1,92 vs 20,14mm ±2,09 for capsulorhexis perimeter (<0.001); 24,73mm2 ±1,92 vs 32,62mm2 ±6,36 for capsulorhexis area (p<0,001). A tendency for better result with the aid of the surgical device was observed for deviation of an ideal diameter or ideal aspect were appreciated: 0,87mm ±0,05 vs 0,9 ±0,04 for deviation of a curve (p=0,06); 1,26mm ±0,12 vs 1,21mm ±0,7 for the capsulorhexis aspect (p=0,09). Conclusion: Capsulorhexis produced with the aid of the surgical device, significantly improved wet-lab capsulorhexis performance.
Highlights
METHODSThis work aims to evaluate the efficacy of a new surgical marker to help in the preparation of the anterior capsulorhexis by analyzing its size and shape, comparing it to the capsulorhexis made manually in a free way.Cataract surgery with intraocular lens implant is the most performed surgical procedure in the world
One of the most important maneuvers of surgery, which is the making of continuous and circular capsulorhexis, is routinely carried out by the free hand, using a cystotome or an appropriate tweezer for that purpose, having as reference the pupillary margin and aiming a diameter that covers the entire edge of the intraocular lens evenly.[1]. Even in more experienced hands, an ideal capsulorhexis is not always achieved
Regarding the area, whose measure corresponding to a 5.0mm diameter circle is 19.652 mm2, the group SEM obtained an average of 32.62 mm2 (± 6.36), whereas the group COM had an average of 24.73 Mm2 (± 1.92)
Summary
This work aims to evaluate the efficacy of a new surgical marker to help in the preparation of the anterior capsulorhexis by analyzing its size and shape, comparing it to the capsulorhexis made manually in a free way. Cataract surgery with intraocular lens implant is the most performed surgical procedure in the world. One of the most important maneuvers of surgery, which is the making of continuous and circular capsulorhexis, is routinely carried out by the free hand, using a cystotome or an appropriate tweezer for that purpose, having as reference the pupillary margin and aiming a diameter that covers the entire edge of the intraocular lens evenly.[1] Even in more experienced hands, an ideal capsulorhexis is not always achieved. The ideal capsulorhexis should be circular, well centered and cover 0.5 mm at the 360° edge of the lens,(4) which makes the intraocular lens completely within the capsular bag and at the effective position of the lens presumed by the formula for calculating the power of the lens, making postoperative refraction as predictable as possible.[3]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
