Posters

Changes in kappa angle and correlative factors analysis before and after phacoemulsification combined with intraocular lens implantation

Poster Details

First Author: L.Ma CHINA

Co Author(s):    B. Lu   J. Zhang                 

Abstract Details

Purpose:

To observe the changes of kappa angle(κ ) before and after phacoemulsification combined with intraocular lens implantation (IOL) and analyze the possible related factors.

Setting:

The Fourth Affiliated Hospital of China Medical University,  Aier Hospital, Shenyang, China

Methods:

182 patients (205 eyes) who underwent phacoemulsification combined with intraocular lens(IOL) implantation were included in the study. All eyes were implanted with the plate haptic IOL (CT ASPHINA 509 M). Follow-up visits were performed postoperatively at 1 week, 1 month, and 3 months.  The lens thickness, anterior chamber depth by Pentacam, photopic and mesopic pupil diameter，photopic and mesopic κ  by OPD III  of the patients were measured and recorded  preoperatively and 3 months postoperatively.The changes in κ  were recorded and possible related factors were analyzed.

Results:

There were 34 eyes with photopic κ increase >0.15mm postopratively (Group A) , whose average preoperative κ was 0.27±0.06. The change in  photopic κ was positively correlated with lens thickness(LT), anterior chamber depth difference and mesopic κ difference. There were 164 eyes with photopic κ increase<0.15mm postopratively (Group B), whose average preoperative κ was 0.17±0.08. The change was positively related with  mesopic κ difference only. The preoperative  κ and LT in group A were significantly larger than those in group B. There were 7 eyes with photopic κ decrease > 0.15mm postoperatively, but of no significance due to fewer cases.

Conclusions:

This study demonstrates that in the eyes of  larger preoperative  κ ,  κ is more likely to increase after  phacoemulsification combined with the plate haptic IOL  implantation, and the change in angle kappa is positively correlated with lens thickness, postoperative  anterior chamber depth increasement, which provides a new basis for guiding multi-focus IOL implantation.

Financial Disclosure:

None