Factors to increase residual astigmatism after toric intraocular lens implantation

Session Details

Session Title: Corneal Astigmatism Assessment. Surgery Equipment

Session Date/Time: Saturday 05/09/2015 | 11:00-13:00

Paper Time: 11:50

Venue: Main Auditorium

First Author: : K.Eun Chul SOUTH KOREA

Co Author(s): :    H. Ho Sik   K. Min Ho   D. Sang Hee   K. Sung Eun   K. Man Soo        

Abstract Details

Purpose:

Accurate toric IOL implantation based on the accurate axis loading of IOL during surgery and the rotational stability of IOL after surgery. We evaluated influencing factors that could increase residual astigmatism after successful toric intraocular lens (IOL) implantation.

Setting:

Department of Ophthalmology and Visual Science, Bucheon St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea

Methods:

The subjects include 50 people (55 eyes) that received phacoemulsification and toric IOL implantation. Group 1 (25 eyes) included patients which had astigmatism of +0.5D(diopter) or higher than predicted residual astigmatism and the group 2 (30 eyes) included astigmatism of +0.5D or lower two months after cataract surgery. Clinical measurements included preoperative, 1-week, 1-month, and 2-month postoperative visual acuity, refraction, keratometer, anterior and posterior corneal astigmatism by Scheimpflug camera imaging, IOL axis rotation, and high order aberration including bow-tie, coma, trefoil, and RMS (Root Mean Square).

Results:

There were no significant differences in best corrected visual acuity (LogMAR) and rotation of IOL axis between the two groups two months after surgery (P>0.05). Astigmatic differences in refractometer and keratometer, degree of posterior corneal astigmatism, RMS, and spherical aberration in group 1 was significantly higher than those in group 2 (P<0.05).

Conclusions:

We can reduce residual astigmatism after toric IOL implantation when considering corneal high order aberration, posterior corneal astigmatism, and astigmatic differences in refractor and keratometer.

Financial Interest:

NONE