Posters

Correction of astigmatism with toric intraocular lenses at the National Rehabilitation Institute of Mexico City, Mexico

Poster Details

First Author: V.Rinconcillo Medellin MEXICO

Co Author(s):    J. Carrera Sanchez   E. Mendoza Schuster                 

Abstract Details

Purpose:

To report the residual astigmatism in patients operated of cataract phacoemulsification with toric intraocular lens implant enVista at the National Rehabilitation Institute for the period June-October 2018

Setting:

We can consider that the astigmatism of the eye is equal to the corneal astigmatism plus the lenticular astigmatism, then if we can eliminate the lens factor (IOL) the astigmatism of the eye will be the corneal astigmatism.

Methods:

Type of study: Descriptive, prospective, longitudinal Inclusion criteria: Patients of both sexes older than 18 years, diagnosed with cataract and according to the LOCS classification NO2 NC2 - NO4 NC4, with keratometric astigmatism greater than 1.25 diopters and less than 4 diopters, operated by the same surgeon, with the same surgical technique. Exclusion criteria: Irregular astigmatism, corneal opacities, Corneal,refractive surgery, pseudoexfoliation, zonular dialysis, amblyopia, uncontrolled Glaucoma, macular disease. All participants underwent a ophthalmological examination: Visual acuity with ETDRS card, Kerato-refractometer 8800, Oculus Pentacam corneal topography, IOL calculation with IOL Master 500, contact Scan AB5500 SONOMED, online calculator toric commercial house enVista

Results:

53 eyes (45 patients), mean age 64.8 years. Preoperative keratometric astigmatism 1.91 diopters (72% 1.25 - 1.9 D, 24% 2-2.9 D, 4% 3-3.9 D) Residual refractive astigmatism at 3 months: 0.58 diopters (+/- 0.50 diopters), 51% 0.50 D, 30% 0.75 D, 11% 1 D, 8% 0.25 d. Statistically significant lower than the preoperative corneal values (p < 0.01), mean reduction astigmatism was 65% +/- 10%. Visual acuity uncorrected at 3 months: logMAR 0.2 +/- 0.2 SD, 20/40 98%, visual acuity corrected at 3 months: logMAR 0.0 20/20 53%, average rotation of the toric intraocular lens 5.48 degrees, +/- 3 degrees.

Conclusions:

In our study, it was shown that the reduction in cylindrical correction, as well as an improvement in uncorrected visual acuity, can be expected in most patients undergoing cataract surgery with toric intraocular lens implantation enVista.

Financial Disclosure:

None