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Vitreous may contribute to accommodation in 1CU IOL, study suggests
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LONDON — An accommodative lens demonstrated less movement in vitrectomized eyes than in nonvitrectomized eyes, suggesting that the vitreous may play a role in the pseudoaccommodative action of the lens, a speaker said here.
At the European Society of Cataract and Refractive Surgeons meeting, Joanne Hancox, FRCOphth, presented a in which she and coworkers analyzed the movement of the HumanOptics 1CU lens in 20 eyes during a postoperative period of 18 to 24 months.
The purpose of the study was to investigate the effects of previous vitrectomy on the movement of the lens, as well as the effects of capsular fibrosis, postoperative time and Nd:YAG laser capsulotomy.
Seven of the 20 patients had undergone vitrectomy before cataract surgery, and their results were compared to those of patients who had not undergone vitrectomy, Ms. Hancox said.
Significantly more pilocarpine-induced forward movement, 268 µm, was seen in the nonvitrectomized eyes, compared with movement of 80 µm in the vitrectomized eyes, Ms. Hancox said.
"Vitrectomized eyes had significantly less IOL movement than nonvitrectomized eyes, suggesting a contribution of the vitreous to accommodation in pseudophakic eyes," she told the audience.
The study also found more movement of the lens in eyes with a YAG capsulotomy than in those without, Ms. Hancox said.
There was no significant change in the amount of IOL movement over time, she said, suggesting that the 1CU has limited movement even before capsular fibrosis takes place.