Posters

Mesopic optical quality and higher-order aberrations after posterior chamber phakic intraocular lens implantation for high myopia

Poster Details

First Author: G.Li CHINA

Co Author(s):    L. Wu   C. Wang                 

Abstract Details

Purpose:

Our study aimed to investigate mesopic optical quality and higher order aberrations (HOAs) after posterior chamber phakic implantable collamer lens (ICL) implantation in high myopia patients.

Setting:

Mesopic vision is a combination of photopic vision and scotopic vision in low but not quite dark lighting situations. There were few study about mesopic optical quality of patients with ICL implantation.

Methods:

Forty two eyes of 24 patients who underwent ICL implantation for myopic correction were enrolled in the prospective interventional study. Preoperative refractive uncorrected, preoperative refractive corrected and 3 months postoperative total ocular wave-front aberration, total ocular point spread function (PSF) strehl ratio and modulation transfer function (MTF) area ratio in mesopic pupils were checked by OPD Scan Ⅲ based on the skiacopy principle. Total ocular HOAs, coma, trefoil, spherical aberration and total corneal HOAs in mesopic pupils before and 3 months after surgery were also assessed. Preoperative and postoperative mesopic pupil diameters were also acquired.

Results:

Preoperative mesopic pupil diameters were significantly higher than that postoperatively (6.20±0.74mmvs5.75±0.95mm, P=0.000). Postoperative total ocular wave-front aberration was significantly higher than that Preoperative refractive uncorrected (P=0.000), but significantly lower than that Preoperative refractive corrected (P=0.000). Postoperative total ocular HOAs, coma, trefoil, spherical aberrations were significantly higher than the preoperative (P<0.05respectively) in mesopic pupils. But total corneal HOAs was not significantly changed (P=0.056) in mesopic pupils. Postoperative total ocular PSF strehl ratio and MTF area ratio was significantly higher than that Preoperative refractive uncorrected (P=0.000), but significantly lower than that Preoperative refractive corrected (P=0.000) in mesopic pupils.

Conclusions:

Our results suggests that postoperative total ocular HOAs, coma, trefoil and spherical aberration are increased significantly after ICL implantation to correct high myopia in mesopic pupils.  Postoperative mesopic optical quality is better than preoperative refractive uncorrected condition but worse than preoperative refractive corrected condition.

Financial Disclosure:

None