Posters

Assessment of positionally induced cyclotorsion using verion guided imaging system for accurate placement of toric intraocular lenses

Poster Details

First Author: R.Sinha INDIA

Co Author(s):    S. D   R. Singh                 

Abstract Details

Purpose:

To analyse posture induced cyclotorsion in eyes undergoing conventional phacoemulsification with toric intraocular lens (IOL) implantation and femto-laser assisted cataract surgery (FLACS) using Verion image-guided system.

Setting:

Dr Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi.

Methods:

Cyclotorsion was assessed in patients who underwent conventional phacoemulsification with toric IOL implantation and FLACS between Jun 2017 and November 2017 with registration of iris architecture, limbal and bulbar conjunctival blood vessels acquired preoperatively using the Verion reference unit (patient in sitting position) and intraoperatively under the microscope using the digital marker of the Verion image-guided system with patient in supine position.

Results:

Forty-four eyes of 30 patients (21 males; 9 females) were included with mean age of 56.5±17.1 years. The mean cyclotorsion induced by change in posture from sitting to supine position was 5.84±3.25 degrees (range, 1-17; median, 5). Overall, clockwise rotation (59.1%) was noted to be more common than counter clockwise rotation (40.9%). Further, clockwise rotation was more common in males as compared to females and counter clockwise rotation was significantly more common in females. Patients who underwent bilateral sequential cataract surgery showed similar cyclorotation (clockwise or counter clockwise) in both eyes more often than mixed rotation (85.7% vs 14.3%).

Conclusions:

Significant cyclotorsion can occur in supine position during cataract surgery. Accurate assessment of the amount and direction of cyclotorsion aids in appropriate alignment of toric IOL for optimal visual outcome.

Financial Disclosure:

None