Supraciliary contraction segments: A new method for the treatment of presbyopia.
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Date
2014-02
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Abstract
Background and Objective: To evaluate the safety and effectiveness of supraciliary contraction segment
implants (SCSIs) for the treatment of presbyopia. Materials and Methods: This prospective, noncomparative
study comprised 10 eyes from five phakic and emmetropic 50-year-old subjects. Preoperative
and postoperative near and distance visual acuity, topography, axial length, pachymetry, and intraocular
pressure were analyzed. A 5.32-mm long and 0.85-mm thick piece of polymethyl methacrylat (PMMA)
and a 5.32-mm long or 0.55-mm thick dried hydrophilic SCSI were placed within the scleral tunnels that
were created 2 mm away from the limbus. The 500–550 μm deep tunnels were parallel to the limbus and
four segments were implanted per eye. The SCSIs were entirely placed at a depth of approximately 85%
in the sclera. Results: The uncorrected distance visual acuity was similar before and after the surgery (0.00
logMAR). The monocular mean uncorrected near visual acuity (UNVA) was 0.5 ± 0.0 before surgery, 0.12
± 0.10 logMAR at 1 month after surgery, 0.16 ± 0.18 logMAR at 3 months after surgery, and 0.29 ± 0.16
logMAR at the 18-month follow-up. Conclusion: Despite obtaining satisfactory results at 6 months after the
surgery, a follow-up of the SCSI intervention at 18 months revealed a regression of the early post-op UNVA
improvement caused by a progressive outward movement of SCSIs.
Description
Keywords
Accommodation, presbyopia, supraciliary segment implants
Citation
Tunc Zeki, Helvacioglu Firat, Ercalik Yesim, Baikoff George, Sencan Sadik. Supraciliary contraction segments: A new method for the treatment of presbyopia. Indian Journal of Ophthalmology. 2014 Feb ; 62 (2): 116-123.