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A Prospective Observational Study Comparing Hybrid Acrylic and Collamer Posterior Chamber Phakic Intraocular Lenses

Gaurav Pande¹, Virendra P Singh², Priyanka²

¹Department of Ophthalmology, Narayana Nethralaya, Bengaluru, IND.

|August 25, 2026

Abstract

Purpose:

To evaluate clinical outcomes following implantation of two types of posterior chamber phakic intraocular lenses: a reinforced hydrophilic acrylic implantable phakic contact lens IPCL (model V2.0; Care Group, Baroda, India) and a Collamer implantable phakic contact lens Visian ICL (model V4c; Staar Surgical Co., Monrovia, CA) for the treatment of high myopia (more myopic than -5.00 Dioptre) in adults.

Objective:

To compare visual and refractive outcomes and postoperative complications between a reinforced hydrophilic acrylic implantable phakic contact lens IPCL and a Collamer implantable phakic contact lens Visian ICL for the treatment of high myopia and myopic astigmatism in adults.

Methodology:

This is a prospective, observational study in a tertiary ophthalmic care centre in Varanasi, India. Fifty-five eyes from 55 patients with high myopia or myopic astigmatism were included in the study. Group A (27 eyes) received implantable phakic contact lens IPCLs, and Group B (28 eyes) received implantable Collamer lens ICLs. All patients underwent preoperative assessments, including optical biometry, keratometry, axial length, central corneal thickness, and white-to-white measurement. Postoperative evaluations were conducted at 1, 6, and 12 months, assessing uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA), refractive stability, and adverse effects.

Results:

Both groups showed statistically significant improvement in visual acuity over 12 months. Preoperative mean LogMAR BCVA was 0.411 ± 0.191 (Group A) and 0.366 ± 0.277 (Group B). At 12 months, mean postoperative LogMAR UCVA was 0.268 ± 0.202 (Group A) and 0.146 ± 0.133 (Group B). Anterior uveitis with intraocular pressure elevation occurred in four eyes (14.8%) in Group A and four eyes (14.3%) in Group B at one week. Glare and halos were reported in eight eyes (29.6%) in Group A and six eyes (21.4%) in Group B during late follow-up.

Conclusion:

Both the IPCL and ICL are effective and safe options for correcting high myopia. ICL showed superior visual outcomes as compared to IPCL with comparable complication rates. Though affordability was not assessed, the reinforced acrylic lens remained a potentially lower-cost material, offering meaningful refractive correction.

Keywords:

high myopia implantable collamer lens implantable phakic contact lens refractive surgery visual outcomes

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