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Age, axial length associated with reduced vision after phakic IOL implantation

J Refract Surg. 2009;25:25-32.

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Axial length and age were linked to diminished postoperative vision in eyes implanted with a phakic IOL. Age was associated with coma-like aberration and spherical aberration.

The retrospective non-comparative study included 60 eyes of 36 highly myopic patients implanted with the Artisan phakic IOL (Ophtec). Investigators assessed contrast sensitivity frequency with and without glare and wavefront aberrations preoperatively and 3 months after surgery. They calculated the area under the log contrast sensitivity function (AULCSF) from contrast sensitivity and used stepwise regression analysis to gauge factors affecting postoperative AULCSF.

Data showed no significant difference between preoperative AULCSF without glare and postoperative AULCSF without glare. Mean AULCSF with glare improved significantly after surgery (P = .018). Axial length and age affected postoperative AULCSF without glare (P = .0002 and P = .0063, respectively).

"The preoperative refraction showed multicollinearity with the axial length, and coma-like aberration and spherical aberration showed multicollinearity with age," the study authors said. "Contrast sensitivity without glare was the same before and after surgery, and contrast sensitivity with glare improved after surgery."