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https://www.readbyqxmd.com/read/29780929/optiwave-refractive-analysis-may-not-work-well-in-patients-with-previous-history-of-radial-keratotomy
#1
Fuxiang Zhang
Purpose: To report a case of significant hyperopic outcome (both eyes) following Optiwave Refractive Analysis (ORA) intraocular lens (IOL) power recommendation in a cataract patient with history of 8 cut radial keratotomy (RK) in each eye. Observations: It is hypothesized that increased intraocular pressure (IOP) from phacoemulsification could make the RK cuts swell, and change cornea shape intraoperatively. In this unique scenario, the corneal curvature readings from ORA could be quite different from preoperative readings or from stabilized postoperative corneal measurements...
June 2018: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29747363/-value-the-correction-of-corneal-astigmatism-in-cataract-surgery
#2
J Wang, Y X Cao
The aim of modern micro-incision phacoemulsification combined with foldable intraocular lens implantation and femtosecond laser-assisted cataract surgery is evolving from a simple pursuit of recuperation to a refractive procedure, which involves the correction of ametropia according to preoperative and postoperative refractive conditions, especially corneal astigmatism, in order to achieve the goal of optimized postoperative uncorrected full range of vision. Nowadays, due attention to the effect of preoperative corneal astigmatism, surgery-induced astigmatism and residual astigmatism after operation is lacked, which affect postoperative visual acuity significantly...
May 11, 2018: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/29610024/topography-guided-transepithelial-photorefractive-keratectomy-to-correct-irregular-refractive-errors-after-radial-keratotomy
#3
Mohammad Ghoreishi, Alireza Peyman, Nima Koosha, Khodayar Golabchi, Mohsen Pourazizi
PURPOSE: To evaluate the efficacy and safety of topography-guided transepithelial photorefractive keratectomy (PRK) in a group of patients with post-radial keratotomy (RK) showing irregular corneas. SETTING: Feiz University Hospital, Isfahan, Iran. DESIGN: Prospective case series. METHODS: Consecutive patients who had irregular astigmatism after RK with stable refraction and topography for at least 1 year were recruited...
March 2018: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29587975/astigmatic-correction-by-intrastromal-astigmatic-keratotomy-during-femtosecond-laser-assisted-cataract-surgery-factors-in-outcomes
#4
Yong-Soo Byun, Seonjoo Kim, Marjorie Z Lazo, Mi-Hyun Choi, Min-Ji Kang, Jee-Hye Lee, Young-Sik Yoo, Woong-Joo Whang, Choun-Ki Joo
PURPOSE: To evaluate the 6-month outcomes of femtosecond laser astigmatic keratotomy (AK) combined with femtosecond laser-assisted cataract surgery and identify factors affecting the efficacy of astigmatic correction. SETTING: Seoul St. Mary's Hospital, Catholic University of Korea, Seoul, South Korea. DESIGN: Retrospective case series. METHODS: Femtosecond laser AK was performed during femtosecond laser-assisted cataract surgery...
February 2018: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29564359/femtosecond-laser-assisted-astigmatic-keratotomy-a-review
#5
REVIEW
John S M Chang
Background: Astigmatic keratotomy (AK) remains an accessible means to correct surgically induced or naturally occurring astigmatism. The advantages of femtosecond laser-assisted astigmatic keratotomy (FSAK) over conventional methods have been recognized recently. Main text: This review evaluates the efficacy, complications, and different methods of FSAK for correction of astigmatism in native eyes and those that underwent previous penetrating keratoplasty (PKP)...
2018: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/29536611/treatment-of-spontaneous-chronic-corneal-epithelial-defects-scceds-with-diamond-burr-debridement-vs-combination-diamond-burr-debridement-and-superficial-grid-keratotomy
#6
Doris Wu, Sara M Smith, Jessica M Stine, Tammy M Michau, Thomas R Miller, Samantha L Pederson, Kate S Freeman
OBJECTIVE: To evaluate the efficacy of diamond burr debridement (DBD) vs a combination of diamond burr debridement with superficial grid keratotomy (DBD+SGK) for the treatment of spontaneous chronic corneal epithelial defects (SCCEDs) in dogs. PROCEDURE: Medical records of dogs diagnosed with SCCEDs from three different institutions that received a DBD or DBD+SGK between 2003 and 2015 were reviewed. Age, breed, sex, history of a previous SCCED, procedures performed, time to healing, and complications were statistically analyzed...
March 14, 2018: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/29426444/eyeprintpro-therapeutic-scleral-contact-lens-indications-and-outcomes
#7
Michael T B Nguyen, Vishakha Thakrar, Clara C Chan
OBJECTIVE: To describe indications and outcomes of patients fitted with the EyePrintPRO therapeutic scleral lens. METHODS: A database search of patients fitted with the EyePrintPRO from 2014 to 2016. Fourteen eyes of 10 patients were reviewed retrospectively. Patient demographics, medical and ocular history, indications for fitting, duration of wear, symptoms, and best-corrected visual acuity (BCVA) were analyzed. RESULTS: Mean age at lens fitting was 49 years (range, 21-67 years)...
February 2018: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/29369200/effectiveness-and-confounding-factors-of-penetrating-astigmatic-keratotomy-in-clinical-practice-case-report
#8
Chu-Yu Yen, Gow-Lieng Tseng
RATIONALE: Penetrating astigmatic keratotomy (penetrating AK) is a well-known method to correct corneal astigmatism but rarely be performed nowadays. This article reevaluated the clinical effectiveness and confounding factors of penetrating AK. PATIENT CONCERNS: Penetrating AK has been introduced to serve as one alternative operation for astigmatism correction, and is thought to have the potential advantage of being more affordable and easy to perform. The purpose of our study is to evaluate the effectiveness and confounding factors of penetrating AK...
January 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29274023/vector-analysis-of-femtosecond-laser-assisted-astigmatic-keratotomy-after-deep-anterior-lamellar-keratoplasty-and-penetrating-keratoplasty
#9
Fouad anNakhli, Ashbala Khattak
PURPOSE: To compare the refractive and keratometric changes induced by femtosecond laser astigmatic keratotomy (AK) for suture-out post-keratoplasty astigmatism in deep anterior lamellar keratoplasty (group I) and penetrating keratoplasty (group II). SETTING: Dhahran Eye Specialist Hospital, Dhahran, Saudi Arabia. DESIGN: Retrospective, comparative, interventional study. METHODS: This study comprised 15 eyes in group I and 35 eyes in group II...
December 22, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/29225985/late-onset-descemet-membrane-detachment-after-radial-keratotomy-resolved-with-medical-therapy
#10
P Rosetta, E F Legrottaglie, R Vinciguerra, P Vinciguerra
Purpose: To report a case of a Descemet membrane's (DM) detachment after radial keratotomy (RK). Methods: A patient (male) underwent RK (16 cuts) 20 years before referring to the Eye Center of Humanitas (Milan) for a progressive visual loss. The slit-lamp examination showed severe corneal stromal edema and a large DM detachment in the lower half of the cornea. Anterior segment optical coherence tomography (AS-OCT) and endothelial cells count confirmed DM detachment and endothelial cells damage...
2017: Case Reports in Ophthalmological Medicine
https://www.readbyqxmd.com/read/29120715/new-pinhole-sulcus-implant-for-the-correction-of-irregular-corneal-astigmatism
#11
Claudio C Trindade, Bruno C Trindade, Fernando C Trindade, Liliana Werner, Robert Osher, Marcony R Santhiago
PURPOSE: To evaluate the effect on visual acuity of the implantation of a new intraocular pinhole device (Xtrafocus) in cases of irregular corneal astigmatism with significant visual impairment. SETTING: University of São Paulo, São Paulo, Brazil. DESIGN: Prospective case series. METHODS: Pseudophakic eyes of patients with irregular corneal astigmatism were treated with the pinhole device. The causes of irregular corneal astigmatism were keratoconus, post radial keratotomy (RK), post-penetrating keratoplasty (PKP), and traumatic corneal laceration...
October 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29066773/biomechanical-simulation-of-stress-concentration-and-intraocular-pressure-in-corneas-subjected-to-myopic-refractive-surgical-procedures
#12
Po-Jen Shih, I-Jong Wang, Wen-Feng Cai, Jia-Yush Yen
Recent advances in the analysis of corneal biomechanical properties remain difficult to predict the structural stability before and after refractive surgery. In this regard, we applied the finite element method (FEM) to determine the roles of the Bowman's membrane, stroma, and Descemet's membrane in the hoop stresses of cornea, under tension (physiological) and bending (nonphysiological), for patients who undergo radial keratotomy (RK), photorefractive keratectomy (PRK), laser-assisted in situ keratomileusis (LASIK), or small incision lenticule extraction (SMILE)...
October 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29023313/mini-scleral-lenses-for-correction-of-refractive-errors-after-radial-keratotomy
#13
Hsiao-Sang Chu, I-Jong Wang, Grace A Tseng, Wei-Li Chen, Yu-Chih Hou, Fung-Rong Hu
OBJECTIVE: To evaluate the factors affecting clinical outcomes of correcting cumulative refractive errors or irregular astigmatism after radial keratotomy (RK) using mini-scleral lenses. METHODS: We retrospectively analyzed 36 eyes receiving mini-scleral lenses after RK from July 2011 to June 2016. Analyses included age, refractive errors, best spectacle-corrected visual acuity (BSCVA), best contact lens-corrected visual acuity (BCLCVA), topographic indices, RK treatment zone diameter (TZD), power difference (PrD) within the RK treatment zone, and decentration distance (DD) of the RK treatment zone center...
October 11, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28924444/implantation-of-a-multifocal-toric-intraocular-lens-after-radial-keratotomy-and-cross-linking-with-hyperopia-and-astigmatism-residues-a-case-report
#14
Raffaele Nuzzi, Francesca Monteu, Federico Tridico
Radial keratotomy is a refractive surgical technique, widely used in the 80s and early 90s to correct myopia and astigmatism, but now overcome by more recent laser techniques. Important consequences, often in patients with more than 45 years of age, are progressive hyperopic shift and/or an increase in corneal astigmatism, whose main cause seems to be an increase in the curvature radius of the central portion of the cornea. This seems to be due to radial keratotomy incisions - with the consequent need for cross-linking - intraocular pressure, and corneal biomechanical parameters...
May 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28919909/photorefractive-keratectomy-in-the-management-of-postradial-keratotomy-hyperopia-and-astigmatism
#15
Mohammad Ghoreishi, Mohammad-Ali Abtahi, Iman Seyedzadeh, Hamid Fesharaki, Mohadeseh Mohammadnia, Hamidreza Jahanbani-Ardakani, Seyed-Hossein Abtahi
BACKGROUND: The aim of this study is to evaluate the results of photorefractive keratectomy (PRK) in the management of postoperative hyperopia and astigmatism in patients with history of radial keratotomy (RK). MATERIALS AND METHODS: This prospective nonrandomized noncomparative interventional case series enrolled consecutive eyes treated with PRK after RK. In cases, in which (1) wavefront (WF) scan was undetectable during primary examinations; and/or, (2) WF data were not transferable to the excimer laser device, patients were treated with the tissue-saving (TS) mode...
2017: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/28891697/management-of-a-nonhealing-superficial-corneal-ulcer-in-a-hyacinth-macaw-anodorhynchus-hyacinthinus
#16
Lynnette Waugh, Jonathan Pucket, Gretchen A Cole, Jennifer D'Agostino
A 26-year-old, female hyacinth macaw (Anodorhynchus hyacinthinus) was presented for ophthalmology consultation for a history of a chronic, nonhealing corneal ulcer of the right eye. On examination, a 5 × 4-mm axial, superficial corneal ulcer with loose epithelial edges was found. During multiple recheck examinations over 4 months, the ulcer was treated by debridement with a sterile cotton-tipped applicator, diamond burr debridement, diamond burr debridement with cyanoacrylate tissue adhesive, and grid keratotomy with cyanoacrylate tissue adhesive, all performed under anesthesia with eventual resolution of the corneal ulcer...
September 2017: Journal of Avian Medicine and Surgery
https://www.readbyqxmd.com/read/28856508/correction-of-hyperopia-with-astigmatism-following-radial-keratotomy-with-daily-disposable-plus-spherical-contact-lens-a-case-report
#17
Yun-Wen Chen, Jiahn-Shing Lee, Chiun-Ho Hou, Ken-Kuo Lin
PURPOSE: To report the refractive correction in a case of hyperopia and astigmatism following radial keratotomy. METHODS: A case report. RESULTS: A 47-year-old woman, who had undergone refractive surgery for radial keratotomy in both eyes 22 years before the present study, presented to our clinic with blurred vision. Her best corrected visual acuity, with spectacle correction of +3.50 DS/-1.50 DCX130° in the right eye and +3.75 DS/-1.50 DCX80° in the left eye, was 0...
August 30, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28828390/comparison-between-toric-and-spherical-phakic-intraocular-lenses-combined-with-astigmatic-keratotomy-for-high-myopic-astigmatism
#18
Lin-Yan Zheng, Shuang-Qian Zhu, Yan-Feng Su, Hu-Yong Zou, Qin-Mei Wang, A-Yong Yu
BACKGROUND: To compare the outcomes of a toric phakic intraocular lens (PIOL) and a spherical PIOL combined with astigmatic keratotomy (AK) for the correction of high myopic astigmatism. METHODS: This study enrolled patients with high myopic astigmatism, including 30 eyes (22 patients) that received a toric PIOL implantation (TICL group), and 32 eyes (24 patients) that received combined AK and a spherical PIOL implantation (AK+ ICL group). The outcomes were compared between the two groups before surgery, and at the following time points after surgery: 1 week, 1, 3, 6 months, and 1, 2 years...
2017: Eye and Vision (London, England)
https://www.readbyqxmd.com/read/28780779/femtosecond-lasers-and-corneal-surgical-procedures
#19
REVIEW
Gustavo K Marino, Marcony R Santhiago, Steven E Wilson
Our purpose is to present a broad review about the principles, early history, evolution, applications, and complications of femtosecond lasers used in refractive and nonrefractive corneal surgical procedures. Femtosecond laser technology added not only safety, precision, and reproducibility to established corneal surgical procedures such as laser in situ keratomileusis (LASIK) and astigmatic keratotomy, but it also introduced new promising concepts such as the intrastromal lenticule procedures with refractive lenticule extraction (ReLEx)...
September 2017: Asia-Pacific Journal of Ophthalmology
https://www.readbyqxmd.com/read/28775086/tailored-lamellar-keratoplasty-a-new-technique
#20
Mohammad Solaimani, Seyed Ali Tabatabaei, Zahra Fallah Tafti
We present a new method for treating complicated corneal gaps among patients who have previously undergone radial keratotomy (RK).After complete healing of a fungal keratitis in a patient who has undergone RK, we removed the oedematous corneal sector and put anterior tailored segment of a corneal button previously used for Descemet stripping endothelial keratoplasty. The patient's best-corrected visual acuity reached to 20/20 6 months later. This technique will compensate for oedematous parts without putting a significant effect on other parts such as purse string sutures...
August 3, 2017: BMJ Case Reports
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