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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