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Cesk Slov Oftalmol 2020 ;1(Ahead of print):1001-1009

Excimer laser refractive surgery is a procedure performed worldwide to solve refractive errors and reduce dependence on glasses or contact lenses. There has been an increase in the number of procedures performed around the world. Myopia is the most common indication for corneal photorefractive surgery. Read More

J Clin Med 2021 May 29;10(11). Epub 2021 May 29.

Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul 03722, Korea.

As laser refractive surgeries (LRS) have been widely performed to correct myopia, ophthalmologists easily encounter patients with glaucoma who have a history of LRS. It is well known that intraocular pressure (IOP) in eyes with glaucoma is not accurate when measured using Goldmann applanation tonometry. However, risk factors for glaucoma progression, particularly those associated with measured IOP, have rarely been studied. Read More

J Pers Med 2021 May 16;11(5). Epub 2021 May 16.

Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea.

This multi-center cohort study included 3401 myopic laser in situ keratomileusis (LASIK) procedures conducted in 1756 myopia patients between 2002 and 2005. Pre- and postoperative uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), and manifest refraction spherical equivalent (SE) were recorded. Factors predicting low postoperative efficacy (defined as a postoperative UCVA < 0. Read More

J Refract Surg 2021 Mar 18;37(3):158-165. Epub 2021 Mar 18.

Purpose: To evaluate changes in anterior corneal asphericity (ΔQ) by calculating tangential radius () after femtosecond laser-assisted in situ keratomileusis (FS-LASIK) and small incision lenticule extraction (SMILE).

Methods: Sirius corneal topography (Costruzione Strumenti Oftalmici) was used to evaluate 120 right eyes from patients with moderate and high myopia who had previously undergone FS-LASIK and SMILE. The preoperative and postoperative tangential radii obtained in reference to various semi-meridional regions and radii zones were compared. Read More

Int J Ophthalmol 2021 18;14(5):737-743. Epub 2021 May 18.

Center for Ophthalmic Optics, Hunan Provincial People's Hospital; the First Affiliated Hospital of Hunan Normal University, Changsha 410005, Hunan Province, China.

Aim: To compare clinical outcomes and refractive stability of implantable collamer lens (ICL) implantation and femtosecond laser assisted laser keratomileusis (FS-LASIK) for high myopia correction.

Methods: The Optical Quality Analysis System (OQAS) was used to evaluate clinical outcomes objectively after operation for high myopia correction. We compared the two procedures in terms of 1-year changes in uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), safety index, efficacy index, spherical equivalent, modulation transfer function (MTF) cutoff frequency, strehl ratio (SR) and objective scatter index (OSI). Read More

Semin Ophthalmol 2021 May 19:1-7. Epub 2021 May 19.

Specialty Eye Hospital Svjetlost, School of Medicine, University of Rijeka, Zagreb, Croatia.

: To compare predicted and measured changes in astigmatism at the posterior corneal surface (PCS) after FsLASIK or LASIK.: Astigmatism was measured at both corneal surfaces (Pentacam) before and 3 months after unremarkable FFsLASIK (roup 1,n = 100) or LLASIK (roup 2,n = 100) for myopia (-7.25DS to -0. Read More

Ophthalmol Ther 2021 May 19. Epub 2021 May 19.

Hoopes Vision Research Center, Draper, UT, USA.

Introduction: Laser-assisted in-situ keratomileusis (LASIK) for the correction of hyperopia and hyperopic astigmatism is challenging and has been less studied than for the correction of myopia and myopic astigmatism. The aim of this study was to analyze the refractive outcomes of LASIK in hyperopia and hyperopic astigmatic eyes using a wave-front optimized laser platform (the Allegretto EX500 laser) and perform a historical comparison with other excimer lasers within the past two decades.

Methods: A one-center (Tertiary Refractive Center, Draper, Utah), retrospective, non-comparative study was conducted on 379 eyes treated with LASIK for hyperopia and hyperopic astigmatism. Read More

BMC Ophthalmol 2021 May 15;21(1):216. Epub 2021 May 15.

Noor Ophthalmology Research Center, Noor Eye Hospital, No. 96 Esfandiar Blvd., Vali'asr Ave, Tehran, Iran.

Background: The refractive surgeries induce corneal higher order aberrations (C-HOAs). In this study, change of C-HOAs after small-incision lenticule extraction (SMILE) compared to femtosecond assisted laser in situ keratomileusis (femto-LASIK), and to photorefractive keratectomy with mitomycin-C (PRK) under photopic and mesopic conditions.

Methods: In this prospective study, age, gender, and apical corneal thickness (ACT) matched cases with moderate myopia [spherical equivalent (SE) 3. Read More

PLoS One 2021 4;16(5):e0250700. Epub 2021 May 4.

Department of Ophthalmology, Ludwig-Maximilians-University, Munich, Germany.

Myopia is the most common refractive error. Surgical correction with laser is possible. LASIK and SMILE are the techniques currently most used. Read More

Med Clin North Am 2021 May 2;105(3):445-454. Epub 2021 Apr 2.

McKnight Vision Research Center, Bascom Palmer Eye Institute, University of Miami-Miller School of Medicine, 900 Northwest 17th Street, Miami, FL 33136, USA.

Cataract surgery is one of the most common surgical procedures performed in the United States. The decision to remove a cataract is determined by the patient's ability to perform activities of daily living, such as reading, driving, and watching television. Cataract surgery also offers the potential of spectacle independence with a wide array of premium intraocular lens options. Read More

Lasers Med Sci 2021 Apr 23. Epub 2021 Apr 23.

Eye Hospital of Shandong First Medical University, 372 Jingsi Road, Jinan, 250021, China.

The purpose of this study is to compare the postoperative corneal biomechanics and assess the influence factors after femtosecond-assisted laser in situ keratomileusis (FS-LASIK) and laser-assisted subepithelial keratomileusis (LASEK) for high myopia. In this retrospective study, patients who completed 1-year follow-up were included. The corneal biomechanical parameters, including deformation amplitude ratio 2. Read More

Int J Ophthalmol 2021 18;14(4):523-528. Epub 2021 Apr 18.

Beijing Tongren Hospital Affiliated to Capital Medical University, Beijing Tongren Eye Center, Beijing Ophthalmology & Visual Science Key Lab, Beijing 100730, China.

Aim: To compare the effect of myopia and astigmatism correction and postoperative change in higher-order aberration as results of receiving small-incision lenticule extraction (SMILE) and femtosecond laser-assisted keratomileusis (FS-LASIK).

Methods: A prospective and non-randomized controlled study was conducted. The subjects are divided into two groups according to different operations received: 229 eyes of 116 patients in the SMILE group and 168 eyes of 86 patients in the FS-LASIK group. Read More

BMC Ophthalmol 2021 Apr 16;21(1):181. Epub 2021 Apr 16.

Augenlaserzentrum Neu-Ulm, Edisonallee 19, 89231, Neu-Ulm, Germany.

Purpose: To compare early clinical outcomes of single-step transepithelial photorefractive keratectomy (tPRK) and photorefractive keratectomy (PRK) regarding refractive outcome, visual acuity, wound healing, pain intensity and visual recovery time.d.

Methods: In this prospective clinical observational study 200 eyes of 100 consecutive patients with mild to moderate myopia with or without mild astigmatism were included. Read More

BMC Ophthalmol 2021 Apr 13;21(1):177. Epub 2021 Apr 13.

Department of Ophthalmology, Kaohsiung Veterans General Hospital, 386, Ta-Chung 1st Road, 813, Kaohsiung City, Taiwan.

Background: Traumatic dislocation of laser-assisted in situ keratomileusis (LASIK) corneal flaps is an uncommon postoperative complication that could occur any time after LASIK, and could be visually devastating. We evaluated the visual outcomes, corneal sensation, tear function, and dry eye questionnaire results of patients with traumatic dislocation of LASIK flaps, including one LASIK flap amputation.

Methods: This is a retrospective case series. Read More

Ann Transl Med 2021 Mar;9(5):373

Department of Ophthalmology and Optometry, Eye and ENT Hospital of Fudan University, Shanghai, China.

Background: To compare the changes in posterior corneal elevation after small incision lenticule extraction (SMILE) and femtosecond laser-assisted laser in situ keratomileusis (FS-LASIK) in correcting myopia over -9 diopters (D).

Methods: In this prospective comparative study, 82 eyes of 82 patients scheduled for refractive correction were recruited. Eyes were randomly assigned to the SMILE group (45 eyes, -10. Read More

J Fr Ophtalmol 2021 May 6;44(5):723-729. Epub 2021 Apr 6.

Service d'ophtalmologie, Hôpital d'instruction des Armées Percy, 101, avenue Henri-Barbusse, BP 406, 92141 Clamart cedex, France; École du Val-de-Grâce, 1, place Alphonse-Laveran, 75230 Paris cedex 05, France.

Hyperopia is a refractive error in which light is focused behind, instead of on, the retina. Clear vision can be obtained by accommodation, but in the long run, this results in eye strain. Hyperopia can be classified as low [≤2. Read More

Medicine (Baltimore) 2021 Apr;100(14):e25366

Woori Eye Clinic, Seo-Ku Daejon, Republic of Korea.

Abstract: To compare and analyze the postoperative 1-year outcomes of laser refractive surgery (LRS) alone vs LRS with laser asymmetric keratectomy (LAK), in patients with myopia, for preventing and resolving LRS complications.This retrospective study compared the preoperative and 1-year postoperative outcomes between the control and comparison groups using a sum of deviations in corneal thickness in 4 directions >80 μm. The control group included 41 patients with myopia (41 eyes) who underwent LRS. Read More

Zhonghua Yan Ke Za Zhi 2021 Apr;57(4):268-276

Department of Ophthalmology, the Affiliated Hospital of Qingdao University, Qingdao 266003, China.

To investigate the repair of subepithelial nerve fibers in different areas of the cornea and the difference of corneal transparency 12 months after small incision lenticule extraction (SMILE), femtosecond laser in situ keratomileusis (FS-LASIK) and excimer laser in situ keratomileusis (LASEK) in high myopia. A cohort study. From June 2018 to October 2019, 30 patients with high myopia (60 eyes) were selected for corneal refractive surgery in the Department of Ophthalmology, Affiliated Hospital of Qingdao University, including 16 females (32 eyes) and 14 males (28 eyes). Read More

Semin Ophthalmol 2021 May 6;36(4):140-148. Epub 2021 Apr 6.

Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA, USA.

The emergence of SMILE in the last decade has provided an alternative to LASIK for patients considering cornea laser refractive surgery. SMILE offers a novel approach using the femtosecond laser to create an intrastromal lenticule that can be removed through a small three to four millimeter incision.The purpose of this study is to review the recent literature on popular SMILE claims - reduced iatrogenic dry eye, better recovery of corneal sensation, and a biomechanically stronger cornea - summarize the published outcomes, and determine which claims are myths versus realities. Read More

Int Ophthalmol 2021 Mar 30. Epub 2021 Mar 30.

Joint Shantou International Eye Center of Shantou University, The Chinese University of Hong Kong, Shantou, 515041, China.

Purposes: To retrospectively compare the short-term refractive outcomes and corneal aberrations after small-incision lenticule extraction (SMILE) and femtosecond-assisted laser-assisted in situ keratomileusis (FS-LASIK) combined with smart pulse technology (SPT) in patients with compound myopic astigmatism.

Methods: A total of 91 eyes (91 patients) were included, 43eyes in FS-LASIK group and 48 eyes in the SMILE group. Uncorrected visual acuity (UCVA), best-corrected visual acuity (BCVA), refractive results and corneal topography were evaluated 1 and 3 months postoperatively. Read More

Clin Ophthalmol 2021 17;15:1163-1172. Epub 2021 Mar 17.

History of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA.

Laser Vision Correction (LVC) is an elective, self-pay and safe surgical procedure to correct myopia and hyperopia. Since FDA approval 25 years ago, there have been a progression of technological improvements leading to better outcomes and LVC is now one of the safest surgical procedures. With a potential pool of 50 million patients, 6000 trained ophthalmic surgeons regularly treating in over 1000 centers of which 65% are physician owned. Read More

Int Ophthalmol 2021 Mar 24. Epub 2021 Mar 24.

Department of Ophthalmology, College of Medicine, King Saud University, Airport Road, P.O. Box 245, Riyadh, 11411, Saudi Arabia.

Purpose: To assess the safety and effectiveness of transepithelial photorefractive keratectomy (T-PRK) in patients with mild myopia using the Schwind Amaris 750 s Excimer laser system which take corneal epithelium variability in consideration during ablation.

Methods: A prospective case series study of patients with mild myopia with or without astigmatism (spherical equivalent ≤ -3 diopters), who underwent T-PRK as a single-step treatment, was carried out at King Abdulaziz University Hospital, Riyadh between May 2017 and January 2018. The main outcomes included postoperative uncorrected distance visual acuity (UDVA), residual refraction (manifest refraction) and complications. Read More

Int J Ophthalmol 2021 18;14(3):423-429. Epub 2021 Mar 18.

Department of Ophthalmology, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi Province, China.

Aim: To compare the quality outcomes of vision at early phase after topography-guided femtosecond laser-assisted keratomileusis (FS-LASIK-CV) and small incision lenticule extraction (SMILE) in treatment of myopia and myopic astigmatism.

Methods: Retrospective comparative analysis of 49 patients that underwent FS-LASIK (=23) or SMILE (=26) procedure for myopia and myopic astigmatism between April and September in 2019. Pre- and postoperative uncorrected visual acuity (UCVA), spherical equivalent refraction (SEQ), cylindrical refraction, contrast sensitivity function (CSF), and corneal higher-order aberrations (HOAs) were evaluated. Read More

J Med Case Rep 2021 Mar 16;15(1):122. Epub 2021 Mar 16.

Takayanagi EYE Clinic, Sapporo S1 Building 3F, Nishi4-20-5, Minami1-jo, Chuo-ku, Sapporo, Hokkaido, 060-0807, Japan.

Background: Corneal refractive surgeries cause epithelial damage and induce wound healing processes. To promote wound healing after photorefractive keratectomy, the effectiveness of an autologous platelet tissue graft was assessed.

Case Presentation: A 45-year-old Asian male with low myopia and/or myopic astigmatism received photorefractive keratectomy in both eyes. Read More

Zhong Nan Da Xue Xue Bao Yi Xue Ban 2021 Feb;46(2):162-168

Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha 410008.

Objectives: To investigate angle Kappa and diopter distribution in myopic patients and the changes of angle Kappa and corneal morphology after Sub-Bowman-Keratomileusis (SBK), and to analyze the effects of the surgery on corneal morphologic changes and the patients' near fixation characteristics.

Methods: The clinical data of 134 myopic patients (268 eyes) undergoing SBK from August 2015 to August 2016 were retrospectively analyzed. Angle Kappa, corneal curvature in the central corneal region of 3 mm, and post-corneal Diff value were measured by Orbscan IIz Corneal Topography System before operation, 1 month and 6 months after operation. Read More

Mil Med 2021 Feb 25. Epub 2021 Feb 25.

Navy Refractive Surgery Center, Naval Medical Center San Diego, San Diego, CA 92134, USA.

Introduction: Femtosecond-assisted thin flap, laser-assisted in situ keratomileusis (LASIK) and photorefractive keratectomy with mitomycin-C (PRK-MMC) are the two most common refractive surgical procedures used to enhance visual capability in the U.S military. The purposes of the study were to examine effects on quality of vision following LASIK and PRK-MMC using a novel computer-based quick contrast sensitivity function (qCSF) test. Read More

Clin Ophthalmol 2021 10;15:491-493. Epub 2021 Feb 10.

Motwani LASIK Institute, San Diego, CA, 92121, USA.

PLoS One 2021 8;16(2):e0242059. Epub 2021 Feb 8.

Department of Ophthalmology, XiangYa Hospital, Central South University, Changsha, Hunan, China.

Aim: To compare postoperative clinical outcomes of high myopia after small-incision lenticule extraction (SMILE) and femtosecond laser-assisted laser in situ keratomileusis (FS-LASIK).

Methods: From March 2018 to July 2020, PubMed, MEDLINE, Embase, the Cochrane Library, and several Chinese databases were comprehensively searched. The studies meeting the criteria were selected and included; the data were extracted by 2 independent authors. Read More

Ophthalmology 2021 May 24;128(5):781-792. Epub 2021 Jan 24.

Francis I. Proctor Foundation and Department of Ophthalmology, University of California, San Francisco, California.

Purpose: To review the literature to evaluate the outcomes of intraocular lens (IOL) power calculation in eyes with a history of myopic LASIK or photorefractive keratectomy (PRK).

Methods: Literature searches were conducted in the PubMed database in January 2020. Separate searches relevant to cataract surgery outcomes and corneal refractive surgery returned 1169 and 162 relevant citations, respectively, and the full text of 24 was reviewed. Read More

Curr Eye Res 2021 Jan 26:1-7. Epub 2021 Jan 26.

Eye Center, Second Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China.

: To evaluate the agreement between the predicted and measured central corneal thickness (CCT) reduction after the small incision lenticule extraction (SMILE) surgery and femtosecond laser-assisted in situ keratomileusis (FS-LASIK) surgery.: A total 165 patients were enrolled in this prospective study. Eighty patients with a mean spherical equivalent (SE) of -4. Read More