Procedures
IOL, Kane
MYOPIA, BARRETT, LENS, IOL
The intraocular lens power was calculated according to the data of IOL master 700. The data were measured repeatedly for at least two times to ensure their accuracy. The calculation formulas were selected according to the length of the patient’s ocular axis, and the refractive power of the intraocular lens was determined after comparison with multiple formulas including Barrett universal II, Haigis, SRK-T, Holladay 2, and Kane. The Symfony IOL power was aimed at emmetropia in the dominant eye and minimal residual myopia (-0.5 ~ 0.75D) or emmetropia in the non-dominant eye in both the micro-monovision and non-micro-monovision groups. The target refraction for both eyes in the mixed group was considered to be emmetropia.Preoperative examinations included IOL Master 700(Carl Zeiss Meditec AG, Jena, Germany), corneal topography (Tomey, Japan), iTrace (Tracey Technologies Corp., Houston, TX, USA) and optical coherence tomography (HEIDELBERG, Germany) and measurement of the dominant eyes. Three months after the second eye surgery, the main observational outcomes include uncorrected distance visual acuity (UDVA) at 5 m, uncorrected intermediate visual acuity (UIVA) at 80 cm, uncorrected near visual acuity (UNVA) at 40 cm, monocular and binocular defocus curve from + 2.0D to -4.0D (0.5 D steps), MTF and PSF (scan diameter 3.0 mm), VF-14 questionnaire and stereopsis examination.