PubMed Health⌕ Search

PubMed · 15050247

Optimizing refractive lens exchange with bimanual microincision phacoemulsification.

Abstract

Bimanual microincision phacoemulsification entails the removal of the crystalline lens through 2 1.2 mm incisions. Infusion is provided through a separate irrigating handpiece, and phacoemulsification and aspiration are performed through a sleeveless phacoemulsification needle. We describe a technique for refractive lens exchange using bimanual microincision phacoemulsification. Capsulorhexis formation, cortical cleaving hydrodissection, lens extraction in the iris plane, and residual cortex removal are performed through the microincisions. This technique offers improved surgeon control throughout the procedure and added safety by maintaining continuous pressurization of the eye while removing the lens far from the posterior capsule.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

I Howard Fine, Richard S Hoffman, Mark Packer. 2004. Optimizing refractive lens exchange with bimanual microincision phacoemulsification.. https://doi.org/10.1016/j.jcrs.2003.07.011

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

Model of pulsatile-flow of aqueous humor through the iris-lens canal.

PURPOSE: To present a model of pulsatile-flow of aqueous humor from posterior (PC) to anterior chamber (AC) and to analyze the sensitivity of this novel model in detecting typical high risk conditions predisposing to pupillary block. METHODS: The model assumes noncontinuous flow of aqueous through the iris-lens canal. Aqueous that fills the canal will be ejected toward the AC-side of the canal at certain time intervals, and between 2 events of aqueous ejection there is no actual flow through this canal. Pupillary pumping rate (PPR) was calculated from the aqueous flow rate and the calculated volume of iris-lens canal. RESULTS: PPR values were generated by incorporating pupillary diameter (1 to 8 mm), aqueous flow rate (1 to 2.5 microL/min), and iris-lens canal width (0.5 to 2 mm) and height (3-9 microm) in numerical experimentation with the present model. PPR showed inverse dependence on iris-lens canal height and pupillary diameter and was directly proportional to aqueous flow rate, in agreement with the steady-flow model. However, contrary to the steady-flow model, PPR showed inverse dependence on iris-lens canal width and predicted the anticipated PC-AC pressure gradient changes at simulated light-dark transition in eyes of patients with clinically narrow angles and ultrasound biomicroscopy evidenced pupillary block. CONCLUSIONS: Upon the incorporation of real ultrasound biomicroscopy measurements in numerical experimentations with both models, the present pulsatile-flow model, contrary to the steady-flow model, showed good predictability of PC-AC pressure gradient changes in a typical condition predisposing to pupillary block.

Anterior Chamber↗