Results 251 to 260 of about 136,945 (289)

Corneal higher-order aberrations in phlyctenular keratitis

Japanese Journal of Ophthalmology, 2020
To characterize tomographic patterns and quantify corneal higher-order aberrations (HOAs) in eyes with corneal scar due to phlyctenular keratitis.Retrospective consecutive case series.This study included 51 eyes of 38 patients (24 women; 14 men) with corneal scar due to phlyctenular keratitis. HOAs of the total cornea, and of the anterior and posterior
Taiichiro Katayama, Yukari Yagi-Yaguchi, Osama Ibrahim, Jun Shimazaki, Takefumi Yamaguchi   +4 more
openaire   +2 more sources

Age-Related Changes in Corneal Spherical Aberration

Journal of Refractive Surgery, 2018
PURPOSE: To analyze the age-related changes in corneal spherical aberration (CSA) and higher order aberrations (HOAs) and to develop a novel model to estimate the change in CSA with age. METHODS: This was a cross-sectional study of the right eyes of 3,769 patients.
Dhanishta, Kemraz, Xue-Ying, Cheng, Xu, Shao, Kai-Jing, Zhou, An-Peng, Pan, Fan, Lu, A-Yong, Yu   +6 more
openaire   +2 more sources

Aberrant Corneal Nerve Regeneration after PRK

Cornea, 2003
To report a case of aberrant corneal nerve regeneration after myopic photorefractive keratectomy (PRK).One patient underwent bilateral PRK to correct a refractive error of -5.50 D in each eye. Thirteen months after the original PRK, the left eye underwent an uncomplicated PRK reoperation to correct a regression of -1.00 D.
Jay C, Erie, Sanjay V, Patel, William M, Bourne   +2 more
openaire   +2 more sources

Using Corneal Height Maps and Polynomial Decomposition to Determine Corneal Aberrations

Optometry and Vision Science, 1997
ABSTRACT: Purpose. To review the use of corneal videokeratoscopic height data, elaborate on the advantages and disadvantages of such data, describe techniques for overcoming the limitations of height data, and demonstrate its use in quantifying the optical properties and aberrations of the ...
J, Schwiegerling, J E, Greivenkamp
openaire   +2 more sources

Changes in corneal aberrations after cataract surgery

Japanese Journal of Ophthalmology, 2016
To study the changes in corneal aberrations after cataract surgery.This study comprised 36 eyes of 36 patients (mean age, 67.3 years) who underwent cataract surgery through a 2.2-mm superior sclerocorneal incision. The anterior, posterior, and total corneal wavefront aberrations for the 6.0-mm pupillary diameter were measured preoperatively and 1 month
Yuki, Hidaka, Takefumi, Yamaguchi, Megumi, Saiki, Murat, Dogru, Kazuo, Tsubota, Kazuno, Negishi   +5 more
openaire   +2 more sources

Control of Corneal Astigmatism and Aberrations

2010
Sub-2 mm incision of MICS manipulates the tissues gently with minimal surgical trauma and distortion of the surrounding tissues. Among the major advantages of MICS is the reduction of surgical trauma resulting in a reduction of surgically induced astigmatism (SIA).
Jorge L. Alió, Bassam El Kady
openaire   +1 more source

The effects of chalazion excision on corneal surface aberrations

Contact Lens and Anterior Eye, 2014
This study is the first to consider the effects of chalazion on corneal surface aberrations taking into account of corneal zones, and to establish the size standard for the excision of chalazion.Twenty three eyes from 23 patients with central upper eyelid chalazion larger than 3mm were recruited in this prospective study.
Young Min, Park, Jong Soo, Lee
openaire   +2 more sources

Corneal aberrations after microincision cataract surgery

Journal of Cataract and Refractive Surgery, 2008
To study the effect of microincision cataract surgery (MICS) on the optical quality of the cornea, characterized in terms of Seidel aberrations.Instituto Oftalmológico de Alicante, Vissum, Alicante, Spain.This study comprised 25 eyes of 25 patients with nuclear or corticonuclear cataract of grade 2+ to 4+ (Lens Opacities Classification System III ...
Bassam, Elkady, Jorge L, Alió, Dolores, Ortiz, Raúl, Montalbán   +3 more
openaire   +2 more sources

Changes of Corneal Aberrations in Sitting and Supine Positions

American Journal of Ophthalmology, 2006
To examine the effect of posture change on corneal aberrations and corneal curvature.Observational case series.The Keratron topographer, improved to measure patients in the supine position, was used to measure the corneal aberrations and the curvature in nine healthy volunteers.
Takushi, Kawamorita, Tomoya, Handa, Hiroshi, Uozato   +2 more
openaire   +2 more sources

Effect of Limbal Relaxing Incisions on Corneal Aberrations

Journal of Refractive Surgery, 2016
PURPOSE:To study the effect of limbal relaxing incisions on corneal aberrations after phacoemulsification with aspheric intraocular lens (IOL) implantation.METHODS:Forty-five eyes underwent microincision cataract surgery with on-axis phacoemulsification incision.
Tamer F, Eliwa, Mona K, Abdellatif, Ismail I, Hamza   +2 more
openaire   +2 more sources