Early rotational stability of the longer Staar toric intraocular lens: fifty consecutive cases.
OBJECTIVE
To determine whether rotational stability is improved with the longer Staar toric intraocular lens (IOL).


METHODS
A private practice, Los Altos, California, USA.


METHODS
Staar Surgical manufactures toric plate-haptic IOLs under +24.0 diopters (D) in 2 lengths. Fifty consecutive eyes requiring toric IOL spherical powers less than +24.0 D received the longer toric IOL (TL; 11.2 mm) using a specific surgical protocol. The IOL axis was recorded at 1 day, 1 week, and a final follow-up visit. Five additional eyes requiring powers greater than +24.0 D received the shorter toric IOL (TF; 10.8 mm), which is the only available length in these powers. Results were compared with those in an initial consecutive series of 6 eyes having implantation of the TF IOL with a power less than +24.0 D before the TL model became available.


RESULTS
Rotational stability of all 50 TL IOLs and the 5 TF IOLs of higher dioptric powers was excellent. One IOL rotated as much as 20 degrees off axis. The repositioning rate was zero in both groups. In the initial 6 eyes receiving the shorter toric IOL in powers below +24.0 D, the repositioning rate was 50%.


CONCLUSIONS
The longer toric IOL had excellent early rotational stability. Rotational and repositioning rates with the TL IOL were superior to those in a previous series of the TF IOL. Adequate overall length is a critical factor in the rotational stability of plate-haptic toric IOLs, and the longer IOL should be used when available.
Chang
David F
DF
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005123:Eye / Q000033:anatomy & histology; D005548:Foreign-Body Migration / Q000517:prevention & control*; D006801:Humans; D019654:Lens Implantation, Intraocular / Q000379:methods*; D007910:Lenses, Intraocular; D008875:Middle Aged; D055095:Optics and Photonics; D018918:Phacoemulsification; D011474:Prosthesis Design; D012399:Rotation; D014792:Visual Acuity