Posters

Effects of decentration and tilt at different orientations on the optical performance of a rotationally asymmetric multifocal intraocular lens

Poster Details

First Author: Y.Huang CHINA

Co Author(s):                        

Abstract Details

Purpose:

To assess the impact of decentration and tilt at different orientations on the optical quality of a rotationally asymmetric multifocal intraocular lens (MIOL).

Setting:

Shandong Eye Institute, Qingdao, China

Methods:

A rotationally asymmetric MIOL (SBL-3; Lenstec, Inc., Christ Church, Barbados) was tested using standardized optical bench testing. The optical quality was quantified using the modulation transfer function, through-focus modulation transfer function, and images of the United States Air Force Target at apertures of 3.0- and 4.5-mm. The MIOL was measured while it was centered, decentered by 0.3 and 0.5 mm, and then tilted by 3 and 5 degrees at near-horizontal (near vision zone), distance-horizontal (distance vision zone), and vertical orientations of the long axis of the MIOL.

Results:

The optical performance was better at aperture of 4.5-mm than 3.0-mm for the centered MIOL. The optical quality was improved at near focus and decreased at distance focus for the near-horizontal decentration, contrary to the status for the distance-horizontal decentration, with a more obvious tendency at 3.0-mm aperture than 4.5-mm. For the near-horizontal tilting, the optical quality at near focus was more significantly deteriorated than distance focus, opposite to that for the distance-horizontal tilting, with a more distinct tendency at 4.5-mm aperture than 3.0-mm.

Conclusions:

The optical quality of the asymmetric MIOL was sensitive to and varied significantly after decentration and tilt at specific directions. Decentration induced increased or decreased optical quality, while tilt just yielded decreased optical quality.

Financial Disclosure:

None