Posters

Ipcl for the correction of extreme myopia

Poster Details

First Author: A.Titov RUSSIA

Co Author(s):    E. Boiko   D. Mirsaitova                 

Abstract Details

Purpose:

To evaluate the possibilities of high myopia correction, including the astigmatic component, using personalized phakic contact lenses (IPCL V2.0 Care Group, India).

Setting:

The S. Fyodorov "Eye Microsurgery" Federal State Institution, St. Petersburg Branch

Methods:

21 patients (37 eyes) were implanted the IPCL V2.0; myopia from -11.0 to -23.0 diopters; astigmatism from -0.5 to -5.5 diopters; age from 22 to 39 years, men-9, women-12; the period of dynamic observation ranged from 3 to 6 months. MEASURED: UCVA; BCVA; spherical and cylindrical components of refraction; ECD of the cornea; IOP; correct and stable lens position; ACD; WtW. 6 patients underwent IPCL implantation on both eyes, and 5 patients had surgery only on one eye.16 patients (19 eyes) had toric models of these lenses implanted while 5 patients (8 eyes) had spherical models implanted.

Results:

UCVA significantly increased from 0.02 ± 0.01 to 0.70 ± 0.29 already 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 by the 1st day after surgery (0.61 ± 0.21) and remained stable by the 6th month of observation (0.72 ± 0.27. The spherical component of refraction decreased on the 1st day on average from -14.27 ± 4.42 to 0.15 ± 0.60, after 1 month (0.12 ± 0.48), it remained stable by the 6th month (0.12 ± 0.62). The cylindrical component of refraction increased from -2.11 ± 1.40 by the 6th month of observation. BCVA of 8 patients (10 eyes) increased in comparison with preoperative data. Previously these eyes were diagnosed as amblyopic. This can be explained as a limitation of optical correction of high myopia in these patients, and diagnosis “ampliopia” was excluded. The average values of corneal ECD were 2846 ± 179.29 cells / mm2 before the surgery and 2734 ±283.37 cells / mm2 6 months after the surgery, which reflects the safety of this surgery. The average IOP was 16.06 ± 0.89 mm Hg,both before and after surgery. The position of the Phakic IOL in the posterior chamber of the eye throughout the entire observation period remained stable. The distance between the posterior surface of the Phakic IOL and the front surface of the lens was within the reference values from 0.25 to 0.75 mm, which falls in the low risks criteria for developing the anterior subcapsular cataract and iris displacement towards the cornea with narrowing or closing the anterior chamber angle, consequently leading to increase in IOP.

Conclusions:

IPCL implantation is safe, effective, predictable method of surgical correction of high myopia, which offers a rapid recovery and high VA. The advantages of implanting these lenses are 1) the absence of limitations in the range of degree of myopia with/without the astigmatic component 2) preserving one's own accommodative response.To ensure the safety of this surgical correction method and to minimize the risk of postoperative complications, it requires careful selection of patients suitable for this kind of surgery, accurate calculation of lens parameters, and the presence of sufficient surgical skills.Further monitoring of patients is necessary.

Financial Disclosure:

None