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Jiho Song, Jae-hyung Kim, Dong Yoon Kim, Tae Hyung Lim, Geunyoung Yoon; Objective depth of field after laser blended vision LASIK using MEL90 platform. Invest. Ophthalmol. Vis. Sci. 2016;57(12):4846.
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© ARVO (1962-2015); The Authors (2016-present)
To investigate the depth of field (DoF) of dominant (DE) and non-dominant (NDE) eyes after Laser Blended Vision (LBV) using MEL-90 platform (Carl Zeiss Meditec).
The ocular aberrations were measured using iTrace (Tracey Technologies) preoperatively and 1 month postoperatively. The modulation transfer functions (MTF) were calculated for a 5 mm pupil and the area under the MTF curve (areaMTF) up to 60 cycles per degree (cpd) was calculated at various defocus points ranged from -1.0 to +3.0 with 0.05 diopter (D) steps The DoF defined as a dioptric range for which image quality is higher than 80% of the maximum of the calculated areaMTF was evaluated.
Two male patients and eight females were included (47.2 ± 4.60 years old). The preoperative root mean square (RMS) of spherical aberration (SA) was 0.26 ± 0.11 and 0.13 ± 0.03 in the DE and 0.30 ± 0.07 and 0.14 ± 0.05 in the NDE (P = 0.39 and 0.39, respectively). The postoperative RMS of SA, horizontal coma, and oblique trefoil in the NDE (0.12 ± 0.5, 0.12 ± 0.06, and 0.15 ± 0.08) was higher than that in the DE (0.12 ± 0.5, 0.07 ± 0.06, and 0.05 ± 0.04, respectively). The maximum of areaMTF was 14.0 ± 3.9 in the DE and 10.6 ± 3.6 in the NDE. The DoF was 1.24 ± 0.51 D and 2.01 ± 1.07 D, respectively (P = 0.01).
With LBV using MEL90 platform, the NDE had larger DoF, relatively. The induced HOAs in the NDE would increase the postoperative DoF.
This is an abstract that was submitted for the 2016 ARVO Annual Meeting, held in Seattle, Wash., May 1-5, 2016.
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