keyword
MENU ▼
Read by QxMD icon Read
search

Astigmatic keratotomy

keyword
https://www.readbyqxmd.com/read/29747363/-value-the-correction-of-corneal-astigmatism-in-cataract-surgery
#1
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
#2
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
#3
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
#4
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/29369200/effectiveness-and-confounding-factors-of-penetrating-astigmatic-keratotomy-in-clinical-practice-case-report
#5
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
#6
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/29120715/new-pinhole-sulcus-implant-for-the-correction-of-irregular-corneal-astigmatism
#7
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/29023313/mini-scleral-lenses-for-correction-of-refractive-errors-after-radial-keratotomy
#8
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
#9
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
#10
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/28856508/correction-of-hyperopia-with-astigmatism-following-radial-keratotomy-with-daily-disposable-plus-spherical-contact-lens-a-case-report
#11
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
#12
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
#13
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/28730124/cataract-surgery-on-post-radial-keratotomy-patients
#14
Alessandro Meduri, Mario Urso, Giuseppe A Signorino, Miguel Rechichi, Cosimo Mazzotta, Stephen Kaufman
This study aims to evaluate and to compare three different approaches of cataract surgery to patients with previous radial keratotomy (RK), and to analyze the mechanical properties of the cornea after cataract surgery. Three groups of patients, each one including 8 eyes of patients with 16 RK incisions. The first group includes eyes with the first cataract incision superiorly, the second group in the temporal area, the third group in temporal area and a precautionary stabilizing suture across the RK incision adjacent to the main tunnel...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28648990/a-numerical-experimental-protocol-to-characterize-corneal-tissue-with-an-application-to-predict-astigmatic-keratotomy-surgery
#15
M Á Ariza-Gracia, Á Ortillés, J Á Cristóbal, J F Rodríguez Matas, B Calvo
Tonometers are intended to determine the intraocular pressure (IOP) and the quality of corneal tissue. In contrast to the physiological state of stress of the cornea, tonometers induce non-physiological bending stress. Recently, the use of a single experiment to calibrate a set of corneal mechanical properties was suggested to be an ill-posed problem. Thus, we propose a numerical-experimental protocol that uses inflation and indentation experiments simultaneously, restricting the optimization space to circumvent the ambiguity of the fitting...
October 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28581285/long-term-stability-of-minimally-invasive-radial-keratotomy-for-mild-to-moderate-keratoconus
#16
Kahoko Fujimoto, Hideya Osawa, Takashi Moriyama, T Miyamoto, Tomomi Irie, Tetsuya Nishimura, Tomoyuki Inoue
PURPOSE: This study aimed to evaluate the long-term stability of minimally invasive radial keratotomy (mini-RK) for eyes with mild to moderate keratoconus. DESIGN: Retrospective observational case series. METHODS: Eleven eyes from 6 patients with hard contact lens (HCL)-intolerant keratoconus underwent mini-RK and were followed up for more than 5 years. The mini-RK consisted of 8 radial incisions with depths of 90% of the thinnest corneal thickness, based on the Lindstrom nomogram...
September 2017: Asia-Pacific Journal of Ophthalmology
https://www.readbyqxmd.com/read/28549845/tomographic-analysis-of-anterior-and-posterior-and-total-corneal-refractive-power-changes-after-femtosecond-laser-assisted-keratotomy
#17
Franziska Löffler, Myriam Böhm, Michael Herzog, Kerstin Petermann, Thomas Kohnen
PURPOSE: To analyze the effect of penetrating femtosecond laser-assisted keratotomy (pFLAK) during laser lens surgery on anterior and posterior corneal astigmatism and total corneal refractive power (TCRP) astigmatism (CAant, CApost, CATCRP) measured with Scheimpflug tomography. DESIGN: Prospective, interventional case series. METHODS: This institutional study included 27 eyes of 23 patients (aged 65 ± 8 years) with low-to-moderate CATCRP determined with Scheimpflug tomography (Pentacam HR; Oculus, Wetzlar, Germany) after penetrating femtosecond laser-assisted keratotomy (pFLAK) and laser lens surgery...
August 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28532939/guiding-flying-spot-laser-transepithelial-phototherapeutic-keratectomy-with-optical-coherence-tomography
#18
REVIEW
Yan Li, Hideaki Yokogawa, Maolong Tang, Winston Chamberlain, Xinbo Zhang, David Huang
PURPOSE: To analyze transepithelial phototherapeutic keratectomy (PTK) results using optical coherence tomography (OCT) and develop a model to guide the laser dioptric and depth settings. SETTING: Casey Eye Institute, Portland, Oregon, USA. DESIGN: Prospective nonrandomized case series. METHODS: Patients with superficial corneal opacities and irregularities had transepithelial PTK with a flying-spot excimer laser by combining wide-zone myopic and hyperopic astigmatic ablations...
April 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28458708/femtosecond-laser-arcuate-keratotomy-for-the-correction-of-postkeratoplasty-high-astigmatism-in-keratoconus
#19
Mohammad Naser Hashemian, Habib Ojaghi, Mehrdad Mohammadpour, Mahmoud Jabbarvand, Firouzeh Rahimi, Mohammad-Ali Abtahi, Mehdi Mazloumi, Seyed-Hossein Abtahi
BACKGROUND: Astigmatism is the leading complication in visual recovery after penetrating keratoplasty (PKP) and deep anterior lamellar keratoplasty (DALK); in this study, we evaluated the outcome of femtosecond laser arcuate keratotomy (FLAK) after DALK and PKP in Iranian keratoconic patients. MATERIALS AND METHODS: In this prospective interventional case series, refractive and keratometric predictability, efficacy, and complications of FLAK for postkeratoplasty astigmatism in keratoconus were evaluated; 23 eyes of 23 consecutive patients (mean age of 32...
2017: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/28210176/femtosecond-astigmatic-keratotomy-for-postkeratoplasty-astigmatism
#20
Nasser Al Sabaani, Salem Al Malki, Mohanna Al Jindan, Abdullah Al Assiri, Samar Al Swailem
PURPOSE: To evaluate the initial outcomes of femtosecond laser arcuate keratotomies (AK) to correct high astigmatism after keratoplasty. METHODS: This retrospective non-comparative interventional study included 52 consecutive patients (52 eyes) who underwent Intralase-enabled arcuate keratotomies. Changes in uncorrected visual acuity (UCVA), best spectacle-corrected visual acuity (BCVA), mean refractive and keratometric astigmatism, preoperative and postoperative manifest refraction and complications were the main outcome measures...
July 2016: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
keyword
keyword
110801
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"