Posters

Stereoscopy in blended vision with refractive low add EDoF IOL

Poster Details

First Author: L.Beckers GERMANY

Co Author(s):    D. Breyer   H. Kaymak   K. Klabe   M. Kirca   F. Kretz   G. Auffarth     

Abstract Details

Purpose:

To improve near vision, refractive segmental low add EDoF IOLs with good far and intermediate vision can be implanted in a blended vision variant (target refraction in non-dominant eye: -1.5D). The aim of this retrospective analysis was to assass the question whether patients also benefit from this variant with regard to stereoscopic near vision.

Setting:

All surgeries were performed at the Breyer-Kaymak-Klabe Eye Surgery and Premium Eyes in Duesseldorf, Germany, member of the International Vision Correction Research Center (IVCRC.net).

Methods:

Patients underwent bilateral implantation of refractive segmental Comfort IOL (1.5D addition, MF15, Oculentis). Target refraction was emmetropia in the dominant eye and in the non-dominant eye -1.5D (blended vision, 29 patients) or emmetropia (emmetropic vision, 20 patients). The third group considered of phakic eyes (24 patients). Three months after surgery, stereopsis was measured using the Stereo Fly Test (Precision Vision). Analogue to logMAR-values for visual acuity, we calculated the logartihm of the minimum angle of stereopsis (logMAS) and compared the median values of all groups. Furthermore, patients answered question from a Quality of Vision questionnaire related to depth perception.

Results:

The minimum angle of stereopsis was 0.37logMAS, 0.00logMAS and -0.18logMAS (median values) in the group with emmetropic vision, blended vision and phakic eyes, respectively. These differences were statistically significant (p<0.05). The evaluation of the questionnaire showed no significant differences.

Conclusions:

Stereoscopic vision is significantly better for blended vision than for emmetropic vision. Phakic eyes outperform both groups. For low spatial frequencies, the eye with lower visual acuity does only slightly impair stereoscopic vision measured with contour-based tests. The differences in the stereopsis were not clinically recognized by patients.

Financial Disclosure:

None