Double-Pass System Assessing the Optical Quality of Pseudophakic Eyes

Lee, Hun*; Lee, Kwanghyun*; Ahn, Ji Min*; Kim, Eung Kweon; Sgrignoli, Bradford; Kim, Tae-im

doi: 10.1097/OPX.0000000000000190
Original Articles

Purpose: To compare the optical quality measurements obtained from the double-pass system and ocular aberrations, subjective visual acuity, and contrast sensitivity score in pseudophakic eyes.

Methods: Three months after cataract surgery, modulation transfer function (MTF) cutoff frequency, Strehl ratio, objective scatter index, and objective pseudoaccommodation obtained from the double-pass system were compared with total aberration, higher-order aberration, and spherical aberration obtained from ray-tracing aberrometer. In addition, parameters of the double-pass system were compared with subjective visual acuity and the contrast sensitivity score.

Results: Forty eyes of 40 patients were included. The MTF cutoff frequency and Strehl ratio were negatively correlated with total aberration (r = −0.503, p = 0.003; r = −0.509, p = 0.003, respectively) and subjective visual acuity (r = −0.453, p = 0.007; r = −0.354, p = 0.040, respectively). The objective scatter index was positively correlated with total aberration (r = 0.451, p = 0.024) and subjective visual acuity (r = 0.516, p = 0.008). The MTF cutoff frequency showed a correlation with contrast sensitivity score under photopic and mesopic conditions.

Conclusions: Optical quality parameters obtained from the double-pass system were correlated with ocular aberrations, subjective visual acuity, and contrast sensitivity score in pseudophakic eyes.

*MD

MD, PhD

DO

Department of Ophthalmology, Institute of Vision Research, Yonsei University College of Medicine, Seoul, Korea (HL, KL, JMA, EKK, BS, T-iK); and Department of Ophthalmology, Corneal Dystrophy Research Institute, Severance Biomedical Science Institute, Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea (EKK).

Tae-im Kim Department of Ophthalmology Yonsei University College of Medicine 250 Seongsanno Seodaemun-gu Seoul 120-752 Korea e-mail: tikim@yuhs.ac

© 2014 American Academy of Optometry