Ten-year observation of corneal densitometry and associated factors following small incision lenticule extraction.

Aim: To investigate the long-term changes of corneal densitometry (CD) and its contributing elements after small incision lenticule extraction (SMILE).

Methods: Totally 31 eyes of 31 patients with mean spherical equivalent of -6.46±1.

Adaptive modal gain controlling for a high-efficiency cylindrical vector beam fiber laser.

We propose and experimentally demonstrate an ytterbium-doped fiber laser emitting the single high-order cylindrical vector beams with a high efficiency and a high modal purity based on adaptive modal gain control. By the combination of a high-order pump with a self-designed ytterbium-ring doped fiber, modal dependent gain was tailored and specific transverse mode can be selected in the laser cavity. A model based on multimode propagation-rate equations is built up to demonstrate the behaviors of transverse mode competition in the fiber laser.

[The clinical study of femtosecond lenticule extraction for myopia].

Objective: To evaluate the clinical efficacy, safety and predictability of femtosecond lenticule extraction (FLEx) for myopia.

Methods: This is a prospective Clinical trial involved 10 cases (10 eyes). The patients aged from 18 years old to 53 years old, an average of (34 ± 11) years old.

[Analysis of flap thickness by anterior segment optical coherence tomography in different flap preparation styles of excimer laser surgery].

Objective: To assess and compare the accuracy and regularity and short-term change of corneal flap in different flap preparation styles.

Methods: Eighty eyes of 40 cases were treated with laser-assisted subepithelial keratectomy. One hundred and fifty-five eyes of 78 cases were treated with laser in situ keratomileusis with 90 microm microkeratome flap preparation and eighty-two eyes of 42 cases were treated with laser in situ keratomileusis with 100 microm femtosecond laser flap preparation.

[Clinical study of diffuse lamellar keratitis after laser in situ keratomileusis].

Objective: To investigate a new clinical grading scale of diffuse lamellar keratitis (DLK) following laser in situ keratomileusis (LASIK) and to observe the clinic outcomes of eyes treated with corresponding classified therapy.

Methods: It was a prospective case-control study. Eyes that developed DLK after LASIK were diagnosed by a new criterion of clinical grading scale based on both severity and scope of inflammatory cells infiltrations in the corneal interface.

[Recovery of corneal sensitivity in extremely high myopia after laser sub-epithelium keratomileusis].

Objective: To evaluate the changes in corneal sensitivity following laser epithelial keratomileusis (LASEK) and epiploic laser in situ keratomileusis (Epi-LASIK) in treatment of extremely high myopia.

Methods: Thirty-seven eyes of 37 patients underwent LASEK and Epi-LASIK to correct myopia, their equivalent sphere ranged from -9.50 DS to -12.

[Effects of short-term VDT usage on visual functions].

Objective: To evaluate the effects of short-term VDT usage on visual functions.

Methods: Visual function of the video display terminal (VDT) operators before and after 1 hour VDT usage were assessed. These included refraction, amplitude of accommodation, near point of convergence, AC/A, phorias, fusional convergence and divergence, tear film break time (BUT) and aberrations.