Clinical Evaluation of AMO Phacoflex SI-30NB in the Aspect of A-constant.
- Author:
Jee Ho CHANG
1
;
Seung Jung LIM
;
Hong Bok KIM
Author Information
1. Department of Ophthalmology, Yonsei University College of Medicine.
- Publication Type:Original Article
- Keywords:
A-constant;
AMO PhacoFlex SI-30NB;
Haptic-optic junction;
Hyperopic shift;
Polypropylene haptic
- MeSH:
Hand;
Models, Theoretical
- From:Journal of the Korean Ophthalmological Society
1999;40(4):987-994
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
We inspected reliability of A-constant of AMO SI-30NB by comparing target diopter and actual postoperative refractive status. Group 1 comprised 191 eyes which were implanted AMO PhacoFlex SI-30NB with corneal incision. Group 2 comprised 45 eyes implanted Pharmacia 812C with scleral incisions. Group 3 comprised 17 eyes implanted AMO OgaciFlex SI-30NB with corneal incision. Refraction was performed on post operative day 1, day 5, day 14, 1 month, and 3 month. It revealed hyperopic shift of 0.31 to 0.40 diopter compared to the target diopters in both Group 1 and Group 3 and no statistical difference was found between two groups(p value>0.05). On the other hand, Group 2 were statistically significant(p value<0.01). We attempted mathematical modelling of this phenomenon and the cause of hyperopylene haptics, structural weakness of haptic-optic junction, and the structure of SI-30NB itself.
