Results 121 to 130 of about 2,287 (160)

Surgically induced astigmatism in human cadaver eyes

Journal of Cataract and Refractive Surgery, 1989
A human cadaver eye model was used to study the effects of various sized limbal and scleral-pocket-type incisions on corneal astigmatism. Limbal incisions of 5.0 mm and 10.0 mm and scleral pocket incisions of 3.5 mm and 7.0 mm were carefully placed in human cadaver eyes.
P M, Flaharty, S B, Siepser
openaire   +2 more sources

Amniotic Membrane Corrects Surgically Induced Astigmatism

Ophthalmologica, 2006
Human amniotic membrane (AM) has been widely used for the reconstruction of ocular surface. We conducted this study to investigate whether AM shows efficacy in maintaining the correction of astigmatism or not. We performed photoastigmatic refractive keratectomy (PARK) on rabbits and grafted AM on the cornea.
Xingtao, Zhou, Sae Heun, Rho, Kyung Won, Yoo, Hee Bae, Ahn, Tae Hyun, Kim, Young Hyun, Yoo, Jae Chan, Kim, Woo Chan, Park   +7 more
openaire   +2 more sources

Long-term course of surgically induced astigmatism

Journal of Cataract and Refractive Surgery, 1988
We performed an analysis of surgically induced astigmatism in 229 cases of extracapsular cataract extraction and posterior chamber lens implantation. The average length of follow-up for patients in this study was 34.4 months (2.87 years). We found that surgically induced astigmatism continued to change for at least three years after surgery.
S C, Richards, R S, Brodstein, W L, Richards, R J, Olson, P H, Combe, K E, Crowell   +5 more
openaire   +2 more sources

Surgically Induced Astigmatism in Cataract Surgery

European Journal of Implant and Refractive Surgery, 1991
A study of 144 extracapsular cataract extractions (ECCE) was undertaken to investigate the long-term development of postoperative astigmatism. The study was prospective with seven postoperative controls. The results were stored and evaluated after 1 year by computer.
exaly   +2 more sources

Surgically induced astigmatism with superior and temporal incisions in cases of with-the-rule preoperative astigmatism

Journal of Cataract and Refractive Surgery, 1998
To evaluate surgically induced astigmatism (SIA), postoperative astigmatism, and uncorrected visual acuity (UCVA) after cataract surgery with superior corneal, superior scleral, and temporal corneal 4.0 mm sutureless incisions in cases of preoperative with-the-rule (WTR) astigmatism.Hopital des Quinze-Vingts, Paris, France.This prospective evaluation ...
S J, Roman, F X, Auclin, D A, Chong-Sit, M M, Ullern   +3 more
openaire   +2 more sources

Reducing Surgically Induced Astigmatism by Using a Scleral Tunnel

American Journal of Ophthalmology, 1984
We conducted a prospective study of 36 eyes undergoing pars plana lensectomy, vitrectomy, and implantation of an intraocular lens. We used a scleral tunnel begun 3 mm posterior to the corneoscleral limbus and entered the anterior chamber through clear cornea. We found that this technique produced minimal postoperative astigmatism.
L J, Girard, J, Rodriguez, M L, Mailman
openaire   +2 more sources

Analysis of Surgically Induced Astigmatism on the Posterior Surface of the Cornea

Journal of Refractive Surgery, 2014
PURPOSE: To measure surgically induced astigmatism (SIA) on the posterior surface of the cornea using Scheimpflug-based keratometry on eyes with with-the-rule astigmatism. METHODS: Repeated Scheimpflug-based keratometry was obtained preoperatively and a mean of 8.65 weeks ...
Nemeth, Gabor, Berta, András, Szalai, Eszter, Hassan, Ziad, Módis, László   +4 more
openaire   +2 more sources

Bivariate Polar Value Analysis of Surgically Induced Astigmatism

Journal of Refractive Surgery, 2002
ABSTRACT PURPOSE: To demonstrate the use of bivariate polar value analysis of surgically induced astigmatism following various cataract incisions. METHODS: In a prospective study, we investigated surgically induced astigmatism following cataract surgery through 9.0-mm, 5.5-mm, and 4.0-mm superior corneal incisions.
Kristian, Naeser, Ellen Birthe, Knudsen, Mette Kaas, Hansen   +2 more
openaire   +2 more sources

Surgically Induced Corneal Astigmatism and its Spontaneous Regression

Ophthalmic Surgery, Lasers and Imaging Retina, 1985
ABSTRACT Serial keratometry readings were obtained pre- and postoperative cataract extraction utilizing all silk closure. The induction of with-the-rule cylinder and its spontaneous regression was plotted over 24 weeks. The data are compared to others utilizing all nylon closure.
openaire   +2 more sources

Popperian falsification of methods of assessing surgically induced astigmatism

Journal of Cataract and Refractive Surgery, 2001
To test several methods of assessing surgically induced astigmatism (SIA). Department of Ophthalmology, Arhus University Hospital, Arhus, Denmark. Assessment methods can be divided into 3 groups. Group 1 includes methods that consider only astigmatic magnitude and disregard astigmatic direction, such as the algebraic and simple subtraction methods ...
openaire   +2 more sources