Comparison of corneal flap thickness using a FS200 femtosecond laser and a moria SBK microkeratome.

Aim: To evaluate differences in flap thickness resulting from use of an Alcon Wavelight FS200 femtosecond laser and a MORIA SBK microkeratome when making a 110-µm-thick corneal flap and to identify the potential factors that affect corneal flap thickness.

Methods: A prospective case study was performed on 120 eyes of 60 patients who were divided into two groups for LASIK, each group consisting of 60 eyes (30 patients). The corneal flaps were created using an Alcon Wavelight FS200 femtosecond laser or a MORIA SBK microkeratome.

Aberration changes of the corneal anterior surface following discontinued use of rigid gas permeable contact lenses.

Aim: To record aberrations with a corneal topographic device on the anterior surface of the cornea at different time-points prior to wearing and following discontinued use of rigid gas permeable (RGP) contact lenses. The effect of wearing RGP on the anterior surface of the cornea was discussed to provide guidance for clinical refractive error correction.

Methods: The study objects were 24 eyes from 24 patients.

[Analysis of aberration changes of the corneal anterior surface following discontinued use of rigid gas permeable contact lenses].

Objective: The present study used a corneal topographic device to record aberrations on the anterior surface of the cornea at different time-points prior to wearing and following discontinued use of rigid gas permeable (RGP) contact lenses. The effect of wearing RGPCL on the anterior surface of the cornea was discussed to provide guidance for clinical refractive error correction.

Methods: The study objects were 60 eyes from 30 patients.

Wavefront aberration and its association with intraocular pressure and central corneal thickness in myopic eyes.

Purpose: To investigate the association between intraocular pressure (IOP), central corneal thickness (CCT), or both and wavefront aberrations in the anterior cornea and the whole eye in myopia.

Setting: Wenzhou Medical College, Wenzhou, Zhejiang, China.

Methods: Seventy myopic subjects were tested with a Humphrey corneal topographer for wavefront aberrations in the anterior corneal surface and with a wavefront aberration-supported cornea ablation wavefront analyzer (Complete Ophthalmic Analysis System, Carl Zeiss Meditec) for wavefront aberrations in the whole eye.

[The relationship between corneal astigmatism with a vector-based method and whole eye second order wavefront aberrations].

Objective: To investigate the relationship between corneal astigmatism and second order wavefront aberration in myopic eyes.

Methods: The corneal astigmatism and the whole eye wavefront aberrations of both eyes of 246 subjects were measured using the Humphrey corneal topography and the WASCA wavefront analyzer. According to axial of the corneal astigmatism, the subjects were divided into five groups (WR(0), WR(180), AR, OA(45) and OA(135)).