Results 141 to 150 of about 7,777 (177)

Comparison of a new optical biometry with an optical low-coherence reflectometry for ocular biometry

Contact Lens and Anterior Eye, 2016
To evaluate the repeatability and agreement of a new partial coherence interferometry optical biometer (AL-Scan, Nidek CO, Aichi, Japan) with optical low-coherence reflectometry device (Lenstar LS 900, Haag-Streit AG, Köniz, Switzerland).Three consecutive measurements with the 2 devices were performed by the same examiner in 65 eyes of 65 patients with
Kulak, Ali Ender, Yuvarlak, Armagan, Hepsen, Ibrahim Feyzi, Guler, Emre, Totan, Yuksel   +4 more
openaire   +5 more sources

Agreement between lens thickness measurements by ultrasound immersion biometry and optical biometry

Journal of Cataract and Refractive Surgery, 2018
To compare lens thickness measurements provided by immersion ultrasound (US) biometry and optical biometry.IRCCS-Fondazione Bietti, Rome, Italy.Evaluation of diagnostic technology.Immersion US biometry and optical biometry were performed in a consecutive series of eyes having cataract surgery.
Giacomo, Savini, Kenneth J, Hoffer, Domenico, Schiano-Lomoriello   +2 more
openaire   +2 more sources

Influence of severity of nuclear cataract on optical biometry

Journal of Cataract and Refractive Surgery, 2006
To compare preoperative and postoperative measurements of the axial length (AL) performed with the IOLMaster (Carl Zeiss Meditec) to evaluate the effect of nuclear cataract on the optical biometry.Department of Ophthalmology, Medical University of Vienna, Vienna, Austria.In 245 consecutive eyes of 162 patients scheduled for cataract surgery, type and ...
Ana, Prinz, Thomas, Neumayer, Wolf, Buehl, Barbara, Kiss, Stefan, Sacu, Wolfgang, Drexler, Oliver, Findl   +6 more
openaire   +2 more sources

Effect of Cycloplegia on Optical Biometry in Pediatric Eyes

Journal of Pediatric Ophthalmology & Strabismus, 2018
Purpose: To study the effect of cycloplegia on optical biometry parameters in pediatric eyes using the Lenstar LS 900 (Haag-Streit, Koeniz, Switzerland). Methods: In this observational and comparative study, 56 normal eyes and 20 cataractous eyes in children between 5 and 15 years ...
Usha K, Raina, Shantanu Kumar, Gupta, Anika, Gupta, Apurva, Goray, Varun, Saini   +4 more
openaire   +2 more sources

Comparison of the measurements of a novel optical biometry: Nidek AL-Scan with Sirius and a ultrasound biometry

International Ophthalmology, 2016
To investigate the accuracy of the measurements of Nidek AL-Scan by comparing with Sirius (CSO, Florence, Italy), a corneal tomography which also employs the Scheimpflug principle, and a commonly used device, ultrasound biometry (UB) (Aviso A/B, Quantel Medical, MT, USA).
Çağlar, İsmail Çağatay, Kocamış, Sücattin İlker, Demir, Emre, Durmuş, Mustafa   +3 more
openaire   +3 more sources

Pseudophakic correction factors for optical biometry

Graefe's Archive for Clinical and Experimental Ophthalmology, 2001
The IOLMaster of Carl Zeiss Jena, which has recently become available, is a combined instrument for biometry and intraocular lens (IOL) planning for cataract surgery utilizing partial coherence interferometry for measuring axial length. Whereas measurement data from classical ultrasound biometry, e.g.
openaire   +2 more sources

Ultrasonic biometry of the optic nerve diameter

Orbit, 1986
The results of the authors' echographic biometry of the optic nerve diameter agree with the different pathophysiological conditions. the method is especially helpful in diseases with secondary changes of the optic disc, such as swelling or atrophy. It gives special information through follow-up in neuritis or optic nerve compression.
Sadanao Tane, Jun Horikoshi
openaire   +1 more source

Influence of operator experience on the performance of ultrasound biometry compared to optical biometry before cataract surgery

Journal of Cataract and Refractive Surgery, 2003
To compare measurements performed with the IOLMaster (Carl Zeiss, Meditec AG) with those obtained by applanation ultrasound (US) and manual keratometry and to evaluate the effect of operator experience on US biometry.Department of Ophthalmology, University of Vienna, Vienna, Austria.The axial length (696 eyes) and anterior chamber depth (ACD) (462 eyes)
Oliver, Findl, Katharina, Kriechbaum, Stefan, Sacu, Barbara, Kiss, Kaija, Polak, Johannes, Nepp, Gebtraud, Schild, Georg, Rainer, Saskia, Maca, Vanessa, Petternel, Birgit, Lackner, Wolfgang, Drexler   +11 more
openaire   +2 more sources

Ray tracing in ellipsoidal reflectors for optical biometry of media

Applied Optics, 2017
In this paper, an analytical basis of ray tracing for optical biometry of media by ellipsoidal reflectors was developed. A ray-tracing algorithm was created, which involves determining the point of interaction of the incident beam with the ellipsoidal reflector, calculating the direction of the reflected beam, and determining the intersection point of ...
M. A. Bezuglyi, N. V. Bezuglaya, I. V. Helich   +2 more
openaire   +2 more sources

Acoustic and optical biometry

Acta Ophthalmologica
Ocular biometry is a diagnostic method in ophthalmology that uses various techniques to measure the different parts of the eye. It involves the use of instruments that can measure the axial length of the eye, corneal curvature, anterior chamber depth, and other parameters related to the eye's structure.
openaire   +1 more source