Postoperative rotation of a 3-piece loop-haptic acrylic intraocular lens.
OBJECTIVE
To assess the rotational stability of the AcrySof MA60BM acrylic intraocular lens (IOL) with and without aspiration of residual lens epithelial cells (LECs).


METHODS
Stoke Mandeville Hospital, Aylesbury, United Kingdom.


METHODS
Routine phacoemulsification was performed with (Group A) or without (Group B) aspiration of residual LECs (random allocation). The baseline position of the IOL was determined from a video frame acquired at the conclusion of surgery. Postoperative IOL position was documented using digital retroillumination images at 2 weeks and 3 months. Early IOL rotation (surgery to 2 weeks postoperatively) was graded as mild (<10 degrees), moderate (10 to 30 degrees), or severe (>30 degrees) by semiobjective comparison of the images. Late IOL rotation (2 weeks to 3 months) was measured more precisely using purpose-designed software.


RESULTS
Group A had incomplete aspiration of residual LECs. The only between-group demographic difference was significantly more men in Group A than in Group B (P<.05). There were no cases of severe early IOL rotation. Mild and moderate early rotation occurred in 91.5% of eyes and 8.5% of eyes, respectively. The mean late rotation was 0.03 degrees +/- 3.06 (SD) (range 7.8 to -8.7 degrees). Aspiration of residual LECs made no statistical difference in early or late rotation (P>.05). Between 2 weeks and 3 months, counterclockwise rotation occurred in 50% of all cases.


CONCLUSIONS
Postoperative rotation of the loop-haptic IOL was stable; LEC clearance did not adversely affect performance. The tendency toward counterclockwise rotation would not preclude good performance of a toric model of the IOL.
Oxford Eye Hospital, UK.
Mario J
MJ
Saldanha
Larry
L
Benjamin
Chetan K
CK
Patel
D000180:Acrylic Resins; D001251:Astigmatism / Q000601:surgery; D019923:Capsulorhexis; D004847:Epithelial Cells / Q000473:pathology; D005260:Female; D005548:Foreign-Body Migration / Q000209:etiology*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007903:Lens Capsule, Crystalline / Q000601:surgery; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D018918:Phacoemulsification; D011183:Postoperative Complications; D011446:Prospective Studies; D012399:Rotation
D000180:Acrylic Resins