Shopping Bag
In line with our strong clinical governance standards, we like to give something back to the ophthalmic community. In this regard we regularly publish peer review articles so that clinicians outwith the Optical Express network can benefit. We have a dedicated bio-statistics team that routinely reviews the outcomes of the patients that we treat. Through our large volumes we are able to scientifically support the clinical decisions taken in patients that we recommend treatment for and those that we don't.  


Intraocular Lenses Papers

Paper: Outcomes of excimer laser enhancements in pseudophakic patients with multifocal intraocular lens
Authors: Steven C Schallhorn, Jan A Venter, David Teenan, Julie M Schallhorn, Keith A Hettinger, Stephen J Hannan, Martina Pelouskova
Published: April 2016
Summary: The aim of this study was to assess visual and refractive outcomes of laser vision correction (LVC) to correct residual refraction after multifocal intraocular lens (IOL) implantation.
Click to view (PDF) »



Paper: NHS comparison with Optical Express clinical outcomes - intraocular lens and cataract
Authors: Steven C. Schallhorn. MD
Published: January 2016
Summary: Steve Schallhorn compares the results of an independently audited data analysis of Optical Express intraocular lens and cataract outcomes with a recently published study of NHS cataract outcomes
Click to view (PDF) »



Paper: Visual acuity improvement in adult amblyopic eyes with an iris-fixated phakic intraocular lens: Long-term results
Authors: Jan A. Venter, MD, Martina Pelouskova, MSc, Steven C. Schallhorn, MD, Barrie M. Collins, Dip. Optom (SA), PhD
Published: March 2015
Summary: To evaluate the effect of implantation of iris-fixated phakic intraocular lenses (pIOLs) (Artisan) in adult amblyopic eyes. The study analyzed data from 5 years of follow-up of amblyopic eyes that were implanted with iris-fixated pIOLs and had a preoperative corrected distance visual acuity (CDVA) of 6/15 or worse. Visual acuity, refraction, endothelial cell count, and complications were assessed.
Click to view (PDF) »



Paper: Visual outcomes and patient satisfaction in 9366 eyes using a refractive segmented multifocal intraocular lens
Authors: Jan A. Venter, MD, Martina Pelouskova, MSc, Barrie M. Collins, Dip.Optom (SA), PhD, Steven C. Schallhorn, MD, Stephen J. Hannan, MCOptom
Published: October 2013
Summary: To report the effectiveness, patient satisfaction, and complication rate with a zonal refractive intraocular lens (IOL) in a high volume of patients.
Click to view (PDF) »



Paper: Visual outcomes and patient satisfaction with a rotational asymmetric refractive intraocular lens for emmetropic presbyopia
Authors: Jan A. Venter, MD, Martina Pelouskova, MSc, Claire E.L. Bull, BSc, Steven C. Schallhorn, MD, Stephen J. Hannan, MCOptom
Published: March 2015
Summary: To evaluate the efficacy, safety, predictability, and patient satisfaction after refractive lens exchange with a zonal refractive intraocular lens (IOL) with an inferior reading addition in emmetropic patients.
Click to view (PDF) »



Paper: Piggyback Intraocular Lens Implantation to Correct Pseudophakic Refractive Error After Segmental Multifocal Intraocular Lens Implantation
Authors: Jan A. Venter, MD; Andre Oberholster, MD; Steven C. Schallhorn, MD; Martina Pelouskova, MSc
Published: January 2014
Summary: To evaluate refractive and visual outcomes of secondary piggyback intraocular lens implantation in patients diagnosed as having residual ametropia following segmental multifocal lens implantation.
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Paper: Outcomes and complications of a multifocal toric intraocular lens with a surface-embedded near section
Authors: Jan Venter, MD, Martina Pelouskova, MSc
Published: June 2013
Summary: To evaluate the refractive outcomes and rotational stability after implantation of a multifocal toric intraocular lens (IOL) with a surface-embedded near section.
Click to view (PDF) »

 

Laser Eye Surgery Papers

Paper: Flap-related infections
AuthorsSteven Schallhorn, MD;
Published: April 2016
Summary: Corneal infection after creation of a lamellar  ap is a potentially devastating complication of LASIK. As demonstrated by the steadily falling number of infectious keratitis cases following corneal refractive surgery, the risk of infection can be reduced through surgical technique, increased awareness, and proper prophylaxis.
Click to view (PDF) »



Paper: Optical Express Case Study: Options of refractive surgery
Authors: Mesha Tanna
Published: March 2016
Summary: Mesha Tanna describes a case study involving a young lawyer who wanted to stop wearing contact lenses due to lifestyle factors, demonstrating the effectiveness of iDesign Intralase Lasik.
Click to view (PDF) »



Paper: Effect of postoperative keratometry on quality of vision in the postoperative period after myopic wavefront-guided laser in situ keratomileusis
AuthorsSteven C. Schallhorn, MD, Jan A. Venter, MD, Stephen J. Hannan, OD, Keith A. Hettinger, MS, David Teenan, MD
Published: December 2015
Summary: To determine whether postoperative keratometry is a predictor of patient-reported satisfaction and night-vision phenomena after wavefront-guided myopic laser in situ keratomileusis (LASIK).
Click to view (PDF) »



Paper: Outcomes of wavefront guided laser in situ keratomileusis using a new generation Hartmann Shack aberrometer
AuthorsSteven C. Schallhorn, MD, Jan A. Venter, MD, Stephen J. Hannan, OD, Keith A. Hettinger, MS
PublishedSeptember 2015
Summary: To evaluate refractive and visual outcomes of wavefront-guided laser in situ keratomileusis (LASIK) to correct high myopia using a new Hartmann-Shack aberrometer.
Click to view (PDF) »



Paper: Factors that Influence Intraocular Pressure Changes after Myopic and Hyperopic LASIK and Photorefractive Keratectomy
AuthorsJulie M. Schallhorn, MD, MS, Steven C. Schallhorn, MD, Yvonne Ou
Published: March 2015
Summary: To describe the factors that influence the measured intraocular pressure (IOP) change and to develop a predictive model after myopic and hyperopic LASIK and photorefractive keratectomy (PRK) in a large population. The Optical Express database was queried for all subjects. Data were extracted on procedure specifics, preoperative central corneal thickness (CCT), IOP (using noncontact tonometry), manifest refraction, average  keratometry, age, gender, and postoperative IOP at 1 week, 1 month, and 3 months. A linear mixed methods model was used for data analysis.
Click to view (PDF) »



Paper: Non-penetrating Femtosecond Laser Intrastromal Astigmatic Keratotomy in Patients With Mixed Astigmatism After Previous Refractive Surgery
Authors: Jan Venter, MD; Rodney Blumenfeld, MD; Steve Schallhorn, MD; Martina Pelouskova, MSc
Published: December 2012
Summary: To report the outcomes of the correction of mixed astigmatism with non-penetrating femtosecond laser intrastromal astigmatic keratotomy in patients with previous refractive surgery.
Click to view (PDF) »



Paper: The Role of the Mesopic Pupil on Patient-Reported Outcomes in Young Patients With Myopia 1 Month After Wavefront-Guided LASIK
AuthorsSteven Schallhorn, MD; Mitch Brown, OD; Jan Venter, MD; Keith Hettinger, MS; Stephen Hannan, OD
Published: November 2013
Summary: To determine the relationship between lowlight pupil size and patient-reported outcomes 1 month after wavefront-guided LASIK in young patients with myopia.
Click to view (PDF) »



Paper: Clinical outcomes of wavefront-guided laser in situ keratomileusis to treat moderate-to-high astigmatism
AuthorsSteven C Schallhorn, Jan A Venter, Stephen J Hannan, Keith A Hettinger
Published13th July 2015
Summary: The purpose of this study was to evaluate the refractive and visual outcomes of wavefront-guided laser in situ keratomileusis (LASIK) in eyes with myopic astigmatism and cylindrical component $2.0 diopter (D).
Click to view (PDF) »



Paper: Factors that Influence Intraocular Pressure Changes after Myopic and Hyperopic LASIK and Photorefractive Keratectomy
AuthorsJulie M. Schallhorn, MD, MS, Steven C. Schallhorn, MD, Yvonne Ou
Published: March 2015
Summary: To describe the factors that influence the measured intraocular pressure (IOP) change and to develop a predictive model after myopic and hyperopic LASIK and photorefractive keratectomy (PRK) in a large population. The Optical Express database was queried for all subjects. Data were extracted on procedure specifics, preoperative central corneal thickness (CCT), IOP (using noncontact tonometry), manifest refraction, average  keratometry, age, gender, and postoperative IOP at 1 week, 1 month, and 3 months. A linear mixed methods model was used for data analysis.
Click to view (PDF) »



Paper: Non-penetrating Femtosecond Laser Intrastromal Astigmatic Keratotomy in Patients With Mixed Astigmatism After Previous Refractive Surgery
Authors: Jan Venter, MD; Rodney Blumenfeld, MD; Steve Schallhorn, MD; Martina Pelouskova, MSc
Published: December 2012
Summary: To report the outcomes of the correction of mixed astigmatism with non-penetrating femtosecond laser intrastromal astigmatic keratotomy in patients with previous refractive surgery.
Click to view (PDF) »



Paper: The Role of the Mesopic Pupil on Patient-Reported Outcomes in Young Patients With Myopia 1 Month After Wavefront-Guided LASIK
AuthorsSteven Schallhorn, MD; Mitch Brown, OD; Jan Venter, MD; Keith Hettinger, MS; Stephen Hannan, OD
Published: November 2013
Summary: To determine the relationship between lowlight pupil size and patient-reported outcomes 1 month after wavefront-guided LASIK in young patients with myopia.
Click to view (PDF) »



Paper: Clinical outcomes of wavefront-guided laser in situ keratomileusis to treat moderate-to-high astigmatism
AuthorsSteven C Schallhorn, Jan A Venter, Stephen J Hannan, Keith A Hettinger
Published13th July 2015
Summary: The purpose of this study was to evaluate the refractive and visual outcomes of wavefront-guided laser in situ keratomileusis (LASIK) in eyes with myopic astigmatism and cylindrical component $2.0 diopter (D).
Click to view (PDF) »



Paper: Wavefront-Guided Photorefractive Keratectomy with the Use of a New Hartmann-Shack Aberrometer in Patients with Myopia and Compound Myopic Astigmatism
AuthorsSteven C. Schallhorn, Jan A. Venter, Stephen J. Hannan, and Keith A. Hettinger
PublishedApril 2015; revised July 2015
Summary: To assess refractive and visual outcomes and patient satisfaction of wavefront-guided photorefractive keratectomy (PRK) in eyes with myopia and compound myopic astigmatism, with the ablation profile derived from a new Hartmann-Shack aberrometer.
Click to view (PDF) »



Paper: One-month Outcomes of Wavefront-guided LASIK for Low to Moderate Myopia With the VISX STAR S4 Laser in 32,569 Eyes
AuthorsSteven C. Schallhorn, MD; Jan A. Venter, MD
Published: July 2009
Summary: To determine the safety and effi cacy of wavefront-guided LASIK for the correction of low to moderate myopia, as performed by surgeons employed by Optical Express, a large corporate provider.
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Paper: Early Flap Displacement after LASIK
AuthorsGerry Clare, FRCOphth, Tara C. B. Moore, PhD, Claire Grills, PhD, Antonio Leccisotti, MD, PhD, Johnny E. Moore, FRCOphth, PhD, Steve Schallhorn, MD
Published: September 2011
Summary: To evaluate the risks of flap displacement after LASIK.
Click to view (PDF) »



Paper: Femtosecond Laser Versus Mechanical Microkeratome: A Retrospective Comparison of Visual Outcomes at 3 Months
AuthorsMesha Tanna, BSc(Hons), MCOptom; Steven C. Schallhorn, MD; Keith A. Hettinger, MS, MBA
Published: July 2009
Summary: To compare the visual outcomes of LASIK procedures in which fl aps were created with a femtosecond laser (IntraLase FS 60Hz, Abbott
Medical Optics [AMO]) to procedures in which flaps were created with a mechanical microkeratome (Moria Evo3 One Use-Plus, Moria SA).
Click to view (PDF) »



Paper: Early Clinical Outcomes of Wavefront-Guided Myopic LASIK Treatments Using a New-Generation Hartmann-Shack Aberrometer
AuthorsSteven Schallhorn, MD; Mitch Brown, OD; Jan Venter, MD; David Teenan, FRCS(Ed), FRCOphth; Keith Hettinger, MS; Hiromi Yamamoto, BS
Published: August 2013
Summary: To provide an initial retrospective evaluation of early postoperative outcomes after wavefront-guided myopic LASIK using a new-generation Hartmann-Shack wavefront sensor.
Click to view (PDF) »



Paper: Effect of Keratometry on Visual Outcomes 1 Month After Hyperopic LASIK
AuthorsJill J. Young, BSc(Hons), MCOptom; Steven C. Schallhorn, MD; Mitchell C. Brown, OD; Keith A. Hettinger, MS, MBA
Published: July 2009
Summary: To determine whether preoperative, postoperative, or change in keratometry can be used to predict visual outcomes in hyperopic LASIK.
Click to view (PDF) »



Paper: An Evidence-based Approach to Patient Selection for Laser Vision Correction
AuthorsMitchell C. Brown, OD
Published: July 2009
Summary: To describe the process used by Optical Express, a large corporate refractive surgery provider, to develop evidence-based patient selection guidelines for laser vision correction.
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Paper: Satisfaction of 13,655 Patients With Laser Vision Correction at 1 Month After Surgery
AuthorsMitchell C. Brown, OD; Steven C. Schallhorn, MD; Keith A. Hettinger, MS, MBA; Stephanie E. Malady, BS
Published: July 2009
Summary: To assess the level of laser vision correction patient satisfaction achieved by a large corporate provider of refractive surgery.
Click to view (PDF) »



Paper: The Effect of Procedure Room Temperature and Humidity on LASIK Outcomes
AuthorsMichael I. Seider, MD, Stephen D. McLeod, MD, Travis C. Porco, PhD, MPH, Steven C. Schallhorn, MD
Published: March 2013
Summary: To determine whether procedure room temperature or humidity during LASIK affect refractive outcomes in a large patient sample.
Click to view (PDF) »

 

 

General Papers

Paper: Using an International Medical Advisory Board to Guide Clinical Governance in a Corporate Refractive Surgery Model
AuthorsJohn A. Vukich, MD
Published: July 2009
Summary: To describe the role played by the International Medical Advisory Board (IMAB) in clinical and corporate governance at Optical Express, a corporate provider of refractive surgery.
Click to view (PDF) »



Paper: The Role of Biostatistics in the Quality Improvement of Refractive Surgery
AuthorsKeith A. Hettinger, MS, MBA
Published: July 2009
Summary: To demonstrate how the large quantity of uniformly collected data available to a corporate refractive surgery provider, Optical Express, is applied to drive improvements in patient outcomes.
Click to view (PDF) »



Paper: A Complex Case Management System Provides Optimal Care for All Patients
AuthorsJan A. Venter, MD; Stephen J. Hannan, MCOptom
Published: July 2009
Summary: To describe the complex case management system developed by Optical Express, a large corporate provider of laser vision correction, and to detail the benefits this system offers for managing the surgical complications of laser vision correction.
Click to view (PDF) »