Possibilities of high myopia and astigmatism correction usingimplantation of posterior chamber Implantable Phakic Contact Lens (IPCL)

    Abstract

    Possibilities of high myopia and astigmatism correction usingimplantation of posterior chamber Implantable Phakic Contact Lens (IPCL)

    Boiko E.V., Titov A.V., Mirsaitova D.R.

    Saint Petersburg branch of S. Fyodorov Eye Microsurgery Federal State Institution
North-Western State Medical University named after I.I. Mechnikov, Department of Ophthalmology
S.M. Kirov Military Medical Academy, Department of Ophthalmology

    Purpose. To evaluate the possibilities of high myopiacorrection, including astigmatic component, using personalized posterior chamber Implantable Phakic Contact Lens (IPCL)

    Material and methods. The results of IPCL implantation were examined in 10 patients (17 eyes) with a myopic refraction from -11.0 to -23.0 D, astigmatic componentfrom -0.5 to -5.5 D, aged 22 to 39 years (average age 29.1±5.22 years), men – 5, women – 5. The follow-up period was 3-6 months. The following indicators were determined: UCVA, BCVA, spherical and cylindrical refractive components, CD, IOP, correctness and stability of the position of the lens.

    Results. UCVA increased from 0.02±0.01 to 0.70±0.29 on the 1st day after the operation and remained stable (0.70±0.29) in the follow-up period after 1, 3 and 6 months. In all patients, BCVA also increased on the 1st day after surgery and remained stable after 6 months of observation, respectively, from 0.61±0.21, to 0.72±0.27. The spherical component of refraction on average decreased on the 1st day from -14.27±4.42 to 0.15±0.60 D, after 1 month (0.12±0.48 D), it remained stable after 6 months (0.12±0.62 D). The cylindrical component of refraction decreased from -2.1 ±1.40 to 0,00 D after 6 months of observation. The average CD values were 2846±179.29 preoperatively and 2734±283.37 cells/mm² after 6 months after surgery. The average IOP was 16.06±0.89 mm Hg. The position of the IPCL in the posterior chamber of the eye remained stable throughout the entire time of observation.

    Conclusion. Implantation of personalized posterior chamber Implantable Phakic Contact Lens (IPCL) is an effective, safe and predictable method of surgical correction of high degree ametropia. In the postoperative period, an increase of both UCVA and BCVA was noted, which indicates that the diagnosis of amblyopia did not correspond to reality; no increase of IOP and loss corneal endothelial cellswere noticed and the lens position was stable.

    Key words: Implantable Phakic Contact Lens, high degree ametropia, laser refractive surgery.