Anterior segment variations after posterior chamber phakic intraocular lens implantation in myopic eyes

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• 作者：Haotian Lin ; PhDAuthor Vitae ; Pisong Yan ; PhD ; Keming Yu ; PhD ; Lixia Luo ; PhD ; Jingjing Chen ; MD ; Zhuoling Lin ; MD ; Weirong Chen ; MD ; ^{chenwr_q@yahoo.com.cn}
• 刊名：Journal of Cataract and Refractive Surgery
• 出版年：2013
• 出版时间：May, 2013
• 年：2013
• 卷：39
• 期：5
• 页码：730-738
• 全文大小：865 K

文摘

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Purpose

To evaluate anterior segment variations after posterior chamber phakic intraocular lens (pIOL) implantation in myopic eyes.

Setting

Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.

Design

Cohort study.

Methods

Patients with high myopia were scheduled for nontoric Implantable Collamer Lens pIOL or toric Implantable Collamer Lens pIOL implantation. Anterior segment optical coherence tomography was performed to evaluate the anterior segment variations over time and the impact of physiologic accommodation and change in brightness after pIOL implantation. Slitlamp photography of the anterior segment was taken after pupil dilation to calculate pIOL rotation.

Results

There was significantly improved visual acuity and refractive status after implantation of?both pIOLs. Anterior segment axial variations had good stability 6 months postoperatively. However, nontoric pIOL rotation occurred in 1 eye 7 months postoperatively and rotation of the toric pIOL occurred in 2 eyes at 3 months and 6 months. Stimulations of ?4.0 diopters (D) and ?8.0?D led to significant changes in anterior chamber depth (ACD) based on the lens (ACD-lens), ACD after pIOL implantation, distance between the pIOL posterior surface and the lens anterior surface (pIOL-lens), and pupil diameter. Increasing ambient light brightness could reduce the ACD-lens and pIOL-lens.

Conclusions

Both pIOLs had good axial stability in myopic eyes 6 months postoperatively; however, rotational stability over time could not be determined. The physiologic adjustment and change in brightness could influence the anterior segment significantly in eyes with a pIOL.

Financial Disclosure

No author has a financial or proprietary interest in any material or method mentioned.