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Effect of coma on near vision in an asymmetric refractive multifocal intraocular lens

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Session Details

Session Title: Pseudophakic IOLs: Multifocal II

Session Date/Time: Sunday 08/10/2017 | 10:30-12:30

Paper Time: 12:08

Venue: Room 2.1

First Author: : H.Kwon SOUTH KOREA

Co Author(s): :    Y. Kim                    

Abstract Details

Purpose:

To evaluate the effect of corneal coma on the visual outcome in the implantation of an asymmetric refractive multifocal intraocular lens (mIOL)

Setting:

GS Eye Clinic, Seoul, South Korea

Methods:

Cases with corneal coma found on the measurement using a rotating Scheimpflug camera and less than 1.5 D of astigmatism were enrolled to this study. The reference axis of corneal coma was determined from their preoperative corneal topography. They were received phacoemusification and implantation of an asymmetric refractive mIOL (LS-312 MF15; Oculentis GmbH, Berlin, Germany). Then the adding power zone was specified to be located at the central axis of their corneal coma. The manifest refraction and the visual acuity at far, intermediate (67 cm), and near (33 cm) were measured two months after the surgery.

Results:

Twelve cases were enrolled to the present study. Zernike coefficients for their cornea were not significantly different between the values before and after the surgery except Z+22, Z-22, Z−24, and Z+24. Mean coma at anterior and posterior surface of their cornea was 0.59 and 1.96 µm, respectively. All cases showed 0 logMAR at far vision except 1 case and more than J2 at intermediate vision. Near vision was found more than J2 in 50% (6/12) and J3 in 100% (12/12), respectively.

Conclusions:

Corneal coma could attribute to extend depth of focus around the add power of an asymmetric refractive mIOL. Even if the cataract patient has corneal coma, the implantation of asymmetric refractive mIOL might be a choice for correcting presbyopia in cataract patients.

Financial Disclosure:

NONE

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