Laser eye surgery

BACKGROUND AND OBJECTIVE: The authors describe a modified surgical technique for Argus II retinal prosthesis implantation. PATIENTS AND METHODS: The modified surgical technique was performed in a 43-year-old male with retinitis pigmentosa (RP) who underwent strabismus surgery in that eye at age 8. RESULTS: During Argus II implantation, the lateral rectus (LR) was noted to be 10 mm posterior to its original insertion due to prior strabismus surgery...

Glaucoma is an irreversible progressive optic neuropathy, for which the major proven treatment is to lower the intraocular pressure (IOP). Five groups of IOP-lowering eye drops have varying mechanisms of action. Some drops, such as β-blockers and α-2 agonists, have potentially serious systemic side effects. Acetazolamide is the only available oral agent; it is effective at lowering IOP, but significant side effects relegate its use usually to refractory glaucoma. Two new eye drops, netarsudil and latanoprostene bunod, have recently been approved by the United States Food and Drug Administration...

BACKGROUND: Non-contact tonometers based on the method using air puff and Scheimpflug's fast camera are one of the latest devices allowing the measurement of intraocular pressure and additional biomechanical parameters of the cornea. Biomechanical features significantly affect changes in intraocular pressure values, as well as their changes, may indicate the possibility of corneal ectasia. This work presents the latest and already known biomechanical parameters available in the new offered software...

PURPOSE: To assess the outcomes of micropulse transscleral cyclophotocoagulation for intraocular pressure (IOP) control in keratoplasty eyes. METHODS: Outcomes of micropulse laser treatments of postkeratoplasty eyes were retrospectively reviewed. IOP was assessed with applanation tonometry. Keratoplasty survival was calculated with Kaplan-Meier survival analysis. RESULTS: Sixty-one eyes in 57 patients received laser treatment; 31 eyes received 1, 21 received 2, 8 received 3, and 1 received 4 treatments...

PURPOSE: To analyze the positional relationships of various centers in patients undergoing femtosecond laser-assisted cataract surgery (FLACS). METHODS: The locations of the pupil center (PC), limbal center (LC) and lens center were analyzed in each patient using optical coherence tomography during FLACS in 35 eyes of 35 patients. Using the preoperative corneal aberrometry device, angle kappa and the location of the visual axis (VA) were calculated. After acquiring the relative horizontal and vertical coordinates of each center, the distance and location among each center were compared...

PURPOSE: To evaluate differences in higher order aberrations (HOAs) between femtosecond laser-assisted cataract surgery (FLACS) and manual cataract surgery. METHODS: In this retrospective cohort study, consecutive patients undergoing FLACS or manual cataract surgery with implantation of an intraocular lens from January 2017 to February 2018 were recruited. Patients underwent aberrometry testing at least 2 months postoperatively. The primary endpoint was internal coma < 0...

PURPOSE: To observe the epithelial remodeling over a 9-mm diameter cornea induced by topography-guided femtosecond laser-assisted in situ keratomileusis (FS-LASIK) for myopia correction using spectral-domain optical coherence tomography (SD-OCT). METHODS: Forty-three eyes of 22 patients who underwent topography-guided FS-LASIK for myopic correction were included. The "Pachymetrywide" scan pattern was used to generate the epithelial thickness map using SD-OCT preoperatively and 1, 3, and 6 months postoperatively...

This paper presents techniques for robot-aided intraocular surgery using monocular vision in order to overcome erroneous stereo reconstruction in an intact eye. We propose a new retinal surface estimation method based on a structured-light approach. A handheld robot known as the Micron enables automatic scanning of a laser probe, creating projected beam patterns on the retinal surface. Geometric analysis of the patterns then allows planar reconstruction of the surface. To realize automated surgery in an intact eye, monocular hybrid visual servoing is accomplished through a scheme that incorporates surface reconstruction and partitioned visual servoing...

Purpose: To assess the efficacy of applying bandage contact lens (BCL) in reducing the fibrotic healing response of flap margins following femtosecond laser in situ keratomileusis (FS-LASIK). Methods: In this prospective, randomized, interventional, observer-masked trial, 41 patients (82 eyes) with myopia and/or myopic astigmatism were scheduled to undergo FS-LASIK. After surgery, patients were fitted with a BCL in one eye (BCL eyes, n =41) but not in the contralateral eye (control eyes, n =41), following randomized allocation of the BCL to the left or right eye of each patient...

PURPOSE: To analyze planning strategies for eyes that gained 1 or more lines of corrected distance visual acuity (CDVA) after topography-guided custom treatment (TCAT). SETTING: Refractive Surgery Clinic, Cleveland Clinic, Ohio, USA. DESIGN: Retrospective case series. METHODS: Eyes having TCAT by the same surgeon between February 2016 and June 2017 were enrolled. The corneal shape was captured with the Wavelight Allegretto Topolyzer diagnostic device coupled with refraction, generating an ablation profile...

PURPOSE: To examine clinical outcomes in deep anterior lamellar keratoplasty (DALK) for keratoconus using contemporary techniques in a multi-surgeon public healthcare setting. DESIGN: Consecutive, retrospective case series. SETTING: Moorfields Eye Hospital, London STUDY POPULATION: Consecutive cases of keratoconus treated with non-laser assisted DALK from September 1st , 2012, to September 31st , 2016. OBSERVATION PROCEDURE: Data on preoperative status, operative details, intraoperative and postoperative complications, secondary interventions, and visual outcomes were archived for analysis...

PURPOSE: To evaluate the quality of vision after excimer laser (MEL 80) correction of presbyopia using micromonovision and aspheric aberration patterns. SETTING: Hospital Universitario QuirónSalud, Madrid, Spain. DESIGN: Prospective case series. METHODS: Patients were assigned to 1 of 3 groups based on the preoperative spherical equivalent. Visual acuity, spherical aberration, contrast sensitivity, quality of vision, and safety of the procedure were assessed preoperatively and at the end of the study...

BACKGROUND/AIMS: To describe the risk factors, clinical features, bacterial subspecies characteristics and treatment outcomes of Moraxella keratitis in a single centre. METHODS: A retrospective review of all patients diagnosed with Moraxella keratitis between November 2012 and December 2017 at the Royal Victoria Eye and Ear Hospital, Dublin, Ireland was performed. Matrix-assisted laser desorption ionisation time-of-flight (MALDI-TOF) mass spectrometry was used to identify Moraxella subspecies...

PURPOSE: Comparison of lens capsule-related complications resulting from femtosecond laser-assisted capsulotomy and manual capsulorhexis in patients with white cataracts. SETTING: Eye Center, Second Affiliated Hospital, Zhejiang Medical School, Hangzhou, China. DESIGN: Prospective consecutive nonrandomized comparative cohort study. METHODS: Selected patients were divided into a femtosecond laser-assisted cataract surgery group (FLACS group) and a conventional phacoemulsification cataract surgery group (CPCS group)...

PURPOSE: To appreciate the epidemiological characteristics and to show the therapeutic aspects of the giant retinal tears. PATIENTS AND METHODS: We conducted a retrospective study from January 2014 to June 2017 on subjects with giant retinal tears. Patients with media opacities limiting examination were excluded. RESULTS: We identified 17 cases of giant retinal tears. The frequency of detachments related to a giant retinal tear was 17% compared to all retinal tears...

OBJECTIVES: To highlight the clinical characteristics, and visual and corneal tomographic outcomes of central toxic keratopathy (CTK) after contact lens (CL) wear and mechanical debridement. METHODS: A retrospective observational case series with literature review. RESULTS: Four patients (4 eyes) were included in this study; 3 (75%) females, mean age 29.3±8.1 years. The mean follow-up was 13.5±7.5 months. Early central or paracentral stromal opacification, assuming an inverse dome-shaped pattern observed under anterior-segment optical coherence tomography, with corneal flattening (Kmean 40...

Purpose: To report diffuse lamellar keratitis (DLK) occurring in an eye that underwent epithelium-off (epi-off) corneal cross-linking (CXL) as a treatment for post-surgical ectasia and the successful treatment of progressive ectasia with a novel epi-on CXL and conductive keratoplasty (CK) treatment. Observations: A 42-year-old man presented with corneal ectasia in his right eye 3 years after laser in situ keratomileusis (LASIK) surgery. He underwent epi-off corneal CXL using the Dresden protocol...

Previous studies compared ocular aberration and visual quality after small-incision lenticule extraction (SMILE) and Q value-guided femtosecond laser-assisted in situ keratomileusis (Q-FS-LASIK), but anterior corneal surface aberration properties are poorly known. This study aimed to compare the changes in anterior corneal surface aberration after SMILE versus Q-FS-LASIK.This was a prospective, observational cohort study. Patients with myopia and myopic astigmatism underwent SMILE or Q-FS-LASIK at Hangzhou MSK Eye Hospital between January 2015 and November 2015...

OBJECTIVE: To investigate effect of femtosecond laser-assisted phacoemulsification in treating cataract patients, and to analyse its influence on serum inflammatory factors IL-6, IL-1β, TNF-α . STUDY DESIGN: An analytical, descriptive study. PLACE AND DURATION OF STUDY: The Ophthalmologic Center, Rehabilitation Center Hospital of Gansu, China, from January 2016 to September 2017. METHODOLOGY: A total of 94 eyes were randomly divided into control group (47 cases) and observation group (47 cases)...

PURPOSE: To assess the efficacy of using a nonste-roidal anti-inflammatory drug preoperatively and of applying the re-dilation technique when necessary to minimize pupil size variation when comparing the degree of mydriasis before femtosecond laser pretreatment with that at the beginning of phacoemulsification. METHODS: This retrospective study included patients who underwent cataract surgery using the LenSx (Alcon Laboratories, Inc., Fort Worth, TX). Our routine dilating regimen with flurbiprofen, tropicamide, and phenylephrine was used...