Small pupil and pupil dilatation methods. Comparative study in cataract surgery

Abstract

PurposeTo compare dilatation pupil devices implemented on cataract surgery, their advantages and disadvantages.MethodsProspective, interventional study to analyze the following pupil dilatation techniques: iris‐retractor hooks and Morcher‐5s, Perfect‐pupil, Graether, Malyugin and Oasis dilator ring. The following properties were studied: handiness, dilatation obtained, stability, and facility to remove the dilator ring in relation with the form, material, size and length of the necessary incision to proceed with the insertion.ResultsIris‐retractor hooks are the best option in cases of zonular instability and retropulsion syndrome. The principal advantage is their versatility. Dilator‐rings obtained similar results in stability and dilatation. Malyugin and Oasis dilator rings had the best handiness results. Graether and Oasis were the easiest to remove and Morcher and Perfect‐pupil the most complicated.ConclusionsHaving a small pupil is one of the main causes of complications in cataract surgery. There are different surgical devices that allow minimizing intra‐operative risks. Each surgeon needs to select the best option compatible with to his surgical technique. Our study revealed that the most used devices were the iris‐retractor hooks due to the capsular stability that they provides and the Oasis dilator‐ring because of its flexibility and how easy they are to remove.

Mechanical dilation of the pupil and its possible applications in femtosecond laser-assisted cataract surgery

“…В исследованиях, описывающих имплантацию кольца Малюгина до проведения ФЛС, лазерная процедура была проведена либо с наличием вискоэластика в передней камере глаза [42,45], либо при его отсутствии [46]. Если в начале операции был введен вискоэластик для имплантации зрачкового кольца, то в последующем при его неполном удалении формировалась неполная капсулотомия.…”