La Pentacam	La Pentacam HR
Datos técnicos	Noticias
Lo relevante del software	Comentarios
Publicaciones	Holladay report

Publicaciones de la Pentacam

Aquí, encontrará algunos artículos acerca de la Pentacam de OCULUS.

Enhancing Ectasia Screening

Corneal tomography and biomechanics measurement can increase screening accuracy.

Careful preoperative screening is paramount for the success of refractive surgery. In the case of LASIK or
PRK, it is crucial to screen patients for corneal abnormalities that, if the patient were operated on, would increase the risk of postoperative corneal ectasia. For instance, patients with keratoconus or pellucid marginal degeneration are known to have poor postoperative outcomes that commonly progress to ectasia. However, some patients with recognized ectatic risk factors remain stable many years after LASIK. Conversely, many cases of ectasia have been reported after LASIK despite patients’ low risk scores on.

Read more...

The BAD may be better for detecting ectatic disease and its susceptibility

A NEW software adaptation to the Pentacam Scheimpflug Tomography (Oculus) called the Belin/Ambrósio Enhanced Ectasia Display (BAD) has been demonstrated as more sensitive than standard techniques in the detection of keratoconus and subclinical ectasia in candidates for corneal refractive surgery, while also providing the “all-clear” in individuals who might otherwise have been unnecessarily deemed unsuitable for such procedures, said Renato Ambrósio MD PhD, Rio De Janeiro, Brazil.

Read more...

The brains behind the BAD

Simplifying pre-operative keratoconus screening

The early detection of ectatic change is of paramount importance to the refractive surgeon.Anterior curvature and ultrasonic pachymetry, alone,does not provide enough information to detect early corneal disease. The combination of anterior and posterior elevation and complete pachymetric data gives the clinician a more complete view of the
structure of the cornea and allows for more effective screening. The OCULUS Pentacam’s Scheimpflug Cross-sectional imaging (OCULUS Optikgerate GmbH, Wetzlar, Germany) provides for a three-dimensional reconstruction of the anterior segment, making possible the assessment of the anterior and posterior corneal surfaces and the creation of a complete pachymetric map. The Belin / Ambrósio Enhanced Ectasia Display (BAD display) was designed to utilise the data supplied by the Pentacam’s rotating Scheimpflug camera and provide a comprehensive keratoconus screening display. The display combines the anterior and posterior elevation and pachymetric data into one all-inclusive display giving the clinician a more complete overview of the corneal shape and allowing for quick and effective screening of refractive surgery patients.

The brains behind the BAD

Elevation Based Topography Book

Oculus a le plaisir de présenter le premier livre publié de Pentacam: "Elevation Based Topography".

Ecrit et publié par le professeur Michael Belin, MD, FACS et par son confrère Stephen S. Khachikian, MD.
"La dernière des choses que je voulais faire était d’écrire un livre", écrit Michael Belin dans sa préface. La tomographie, ou topographie d’élévation, représente une méthode nouvelle et concrète d’analyse de la cornée, de sa structure, de sa forme et de ses capacités. L’auteur considère que l’analyse base sur la règle de Scheimpflug offre un ensemble d’avantages non négligeables dans le traitement, le diagnostique et la ‘sécurité’ des patients. Les co-auteurs de cette publication sont Renato Ambrosio Jr., MD, PhD, Frederico Guerra, MD et Marcella Salomao, MD.
La priorité a été donnée à l’auscultation de patients dans le cadre de la chirurgie réfractive, de l’interprétation des cartes d’élévation, des cartes d'épaisseur de la cornée et de l’analyse de l’évolution de cette dernière. Les Docteurs Belin & Khachikian abordent le sujet de manière ordonnée, systématique, commençant par les cas de base pour progresser vers les plus complexes. Le livre est richement illustré par des photographies et schémas en couleur. Ce document de référence devrait être le livre de chevet de tout chirurgien cherchant à comprendre en profondeur la topographie moderne.
Le livre Pentacam "Elevation based Topography" est publié par Highlights of Ophthalmology, ISBN No.: 978-9962-613-51-0.
Il est disponible auprès du distributeur Pentacam de votre pays de résidence.

Veuillez vous référer au localisateur de distributeurs pour plus d’informations.

Elevation Based Topography Book

Oculus presenta con orgullo el primer libro publicado sobre la Pentacam: "Elevation Based Topography".

Los editores y autores han sido el Prof. Michael Belin, MD, FACS y su compañero Stephen S. Khachikian, MD.
"Lo último que quería hacer era escribir un libro", afirma Michael Belin en el preámbulo."La topografía basada en la elevación (o tomografía) es una forma nueva y exhaustiva de mirar la córnea, su estructura, forma y comportamiento. El autor cree..., que el análisis de Scheimpflug de la sección circular ofrece ventajas significativas en el tratamiento, diagnóstico y seguridad del paciente". Otros co-autores son Renato Ambrosio Jr., MD, PhD, Frederico Guerra, MD y Marcella Salomao, MD.
Se centra principalmente en los pacientes a examinar para la cirugía de refracción, la interpretación de los mapas de elevación, los mapas del grosor de la córnea y su análisis de progresión. Los Drs. Belin y Khachikian presentan el tema con un método sistemático y ordenado, que comienza con lo básico y va avanzando para que se entiendan casos complejos. El libro está ampliamente ilustrado a todo color. Esta obra maestra pretende servir de texto básico para cualquier cirujano de refracción interesado en entender la topografía moderna.
El libro sobre la Pentacam "Elevation based Topography" ha sido publicado por Highlights of Ophthalmology, ISBN No.:978-9962-613-51-0.
Está disponible a través del distribuidor local de la Pentacam de su país de residencia.

topography (or Tomography) is a new and comprehensive way of looking to the cornea, its structure, shape and performance. It is the authors belief, ..., that cross-sectional Scheimpflug analysis offers significant advantages in treatment, diagnosis and patients' safety". Further co-authors are Renato Ambrosio Jr., MD, PhD, Frederico Guerra, MD and Marcella Salomao, MD.

The main focus was given to screen patients for refractive surgery, the interpretation of elevation maps, corneal thickness maps and its progression analysis. Drs. Belin & Khachikian present the topic in an orderly, systematic method ,that starts with the basics and progresses to understanding complex cases. The book is extensively illustrated with generous use of color. This masterpiece should serve as a basic text for any refractive surgeon interested in understanding modern topography.

The Pentacam book "Elevation based Topography" was published from the Highlights of Ophthalmology, ISBN No.:978-9962-613-51-0.

It is available thru the local distributor of Pentacam in your country of residence.

Por favor, para más información, consulte el localizador de distribuidores.

Elevation Based Topography Book

Oculus proudly presents, the first published book of Pentacam: "Elevation Based Topography".

It was editored and authored by Prof. Michael Belin, MD, FACS and his fellow Stephen S. Khachikian, MD.

"The last thing I wanted to do is write a book", stated Michael Belin in his preface." Elevation based topography (or Tomography) is a new and comprehensive way of looking to the cornea, its structure, shape and performance. It is the authors belief, ..., that cross-sectional Scheimpflug analysis offers significant advantages in treatment, diagnosis and patients' safety". Further co-authors are Renato Ambrosio Jr., MD, PhD, Frederico Guerra, MD and Marcella Salomao, MD.

The main focus was given to screen patients for refractive surgery, the interpretation of elevation maps, corneal thickness maps and its progression analysis. Drs. Belin & Khachikian present the topic in an orderly, systematic method ,that starts with the basics and progresses to understanding complex cases. The book is extensively illustrated with generous use of color. This masterpiece should serve as a basic text for any refractive surgeon interested in understanding modern topography.

The Pentacam book "Elevation based Topography" was published from the Highlights of Ophthalmology, ISBN No.:978-9962-613-51-0.

It is available thru the local distributor of Pentacam in your country of residence.

Please check the distributor locator for more information.

Long-term stability of the posterior cornea after laser in situ keratomileusis

Forward protrusion or displacement of the posterior corneal surface is found topographically in eyes with ectasia after laser in situ keratomileusis (LASIK). Studies found that changes to the posterior corneal surface commonly occur after LASIK. The reported forward protrusion of the posterior corneal surface has characteristics similar to those of keratectasia and was believed to represent a subclinical form of post-LASIK ectasia.

Long-term stability of the posterior cornea after laser in situ keratomileusis

Evaluación de Patologías del Segmento Anterior Usando Pentacam

Principio de Medida del Pentacam

El Pentacam obtiene las imágenes del segmento anterior por una medida de cámara Scheimpflug rotatoria. La cámara es una cámara digital CCD con muestreo de pixeles sincronizados. La fuente de luz consiste en LED azul libre de UV con una longitud de onda de 475 nm. Este proceso rotatorio suministra fotos en tres dimensiones y también permite que el centro de la córnea sea medido de forma precisa. Este también ayuda a evitar errores que pueden surgir de un escaneo omni-direccional,
influenciando el modelo entero de 3D. El programa usa un algoritmo de trazado de rayos para construir y calcular el segmento anterior.

grewal_spanish.pdf [663 KB]

Aplicaciones del PENTACAM en el Análisis del Segmento Anterior

Pentacam-Scheimpflug en Enfermedades de la Córnea

La transparencia de la córnea es una característica notable que es esencial para la visión. Modelos biofísicos de transparencia corneana se han enfocado totalmente en la matriz extracelular estromal y en la disrupción del arreglo regular de las fibras colágenas como razón principal para córneas nubladas. Por lo tanto, el desorden de la transparencia de la córnea ha sido explicado tradicionalmente por una combinación de tres factores principales: (1) contenido anormal de agua (hinchazón o edema); (2) diámetro, espaciamiento, y orientación anormal de las fibras colágenas (tejido cicatrizado o fibrosis); y (3) acumulación anormal de macromoléculas (proteínas, glicosaminoglicanos, lípidos y otros).

verges_spanish.pdf [1.7 MB]

Evaluation of Anterior Segment Pathologies Using Pentacam

Pentacam Principle of Measurement

The Pentacam obtains images of the anterior segment by a rotating Scheimpflug camera measurement. The camera is a digital CCD camera with synchronous pixel sampling. The light source consists of UV-free blue LED’s with a wavelength of 475 nm. This rotating process supplies pictures in three dimensions and also allows the center of the cornea to be measured precisely. It also helps to avoid errors that may
arise from an omni-directional scan, influencing the entire 3D model. The software utilizes a ray tracing algorithm to construct and calculate the anterior segment.

Evaluation of Anterior Segment Pathologies Using Pentacam

Applications of PENTACAM in Anterior Segment Analysis

Pentacam-Scheimpflug in Corneal Diseases

Corneal transparency is a remarkable characteristic that is essential for vision. Biophysical models of corneal transparency have entirely focused on the stromal extracellular matrix and disruption of the regular array of collagen fibres as the main reason for corneal haziness. Therefore, disorder of corneal transparency has traditionally been explained by a combination of three main factors: (1) abnormal water content (i.e. swelling or oedema); (2) abnormal collagen fibre diameter, spacing, and orientation (i.e. scar tissue or fibrosis); and (3) abnormal accumulation
of macromolecules (proteins, glycosaminoglicans, lipids and others).

Applications of PENTACAM in Anterior Segment Analysis

Evaluación del Segmento

Anterior Después de Iridotomía Periférica Láser en Ojos con Cierre Primario del Ángulo (CPA)

El glaucoma primario de ángulo cerrado (GPAC) es una forma importante de glaucoma en Asia.1 Esta es una de las principales causas de ceguera en todo el mundo.2 La iridotomía periférica láser (IPL) es la intervención estándar de primera línea tanto en las formas agudas como en las crónicas3. Ésta es exitosa en prevenir la recurrencia de ataques agudos y elimina prácticamente el riesgo de un ataque agudo en el ojo asociado4. La iridotomía periférica elimina el bloqueo pupilar, permitiendo que el iris convexo se aplane y se amplíe el ángulo de la cámara anterior (Figura 1). Tales cambios en la morfología del ángulo de la cámara anterior son difíciles de evaluar. La gonioscopía es difícil derealizar en una forma reproducible, limitando la capacidad de cuantificar los cambios después de la IPL.

issue_4_2008spanish.pdf [462 KB]

Uso del Pentacam™

para Calcular el Poder del LIO

Debido a los avances en técnica quirúrgica y diseño de LIO, los pacientes son más y más demandantes de agudeza visual postoperatoria no corregida excelente. Lograr esta meta requiere de una evaluación preoperatoria muy completa, medidas precisas, el uso de fórmulas apropiadas de cálculo del poder del LIO, la selección del LIO más apropiado para cada paciente individual, y una técnica quirú

issue3_spanish.jpg [17 KB]

Aplicación del Pentacam en Anillos Intraestromales

El segmento de anillo corneano intraestromal es un dispositivo diseñado inicialmente para corregir miopía leve a moderada al aplanar la curvatura corneana anterior sin invadir el eje visual. El dispositivo es un anillo transparente de PMMA de dos tipos, uno con un diámetro externo de 8.1 mm y un diámetro interno de 6.8 mm. Éste es cortado a precisión por un torno a ±0.01 mm como una sección de forma hexagonal de un cono llamado INTACTS® y el otro con 6.3 mm de diámetro externo y 5.7 mm de diámetro interno en una forma piramidal llamado FERRARA RINGS®. Esos son insertados a través de una incisión radial periférica hecha con un cuchillete de diamante a dos-tercios de profundidad corneana en un canal intraestromal periférico creado con instrumentos especialmente diseñados.1 La curvatura corneana anterior es cambiada al usar anillos de diferente espesor. Para ofrecer al paciente la corrección más precisa en su defecto ametrópico debemos evaluar los cambios corneanos con modalidades de proyección de imagen avanzada, muchas de las cuales prometen entregar información cuantitativa e imágenes cualitativas de la córnea y la cámara anterior. Estos equipos tienen un rango de aplicaciones, incluyendo el diagnóstico y rastreo de patología, la planeación y monitoreo de cirugía refractiva, y el estudio de acomodación.

issue_2_2008spanish.pdf [1.3 MB]

Evaluation of Anterior Segment Changes

Following Laser Peripheral Iridotomy Using

Primary angle-closure glaucoma (PACG) is a major form of glaucoma in Asia.1 It is a leading cause of blindness worldwide. 2 Laser peripheral iridotomy (LPI) is the standard firstline intervention in both acute and chronic forms3. It is successful in preventing recurrence of acute attacks and virtually eliminates the risk of an acute attack in the fellow eye4. Peripheral iridotomy eliminates pupillary block, allowing the convex iris to flatten and widening the anterior chamber angle (Figure 1). Such changes in anterior chamber angle morphology are difficult to assess. Gonioscopy is difficult to perform in a reproducible fashion, limiting the ability to quantify changes after LPI.

Evaluation of Anterior Segment Changes

Using the Pentacam™ for IOL Power Calculation

Because of advances in surgical technique and IOL design, patients are more and more demanding of excellent uncorrected postoperative vision acuity. Achieving this goal requires a very complete preoperative evaluation, precise measurements, the use of appropriate IOL power calculation formulas, the selection of the most appropriate IOL for each individual patient, and a flawless surgical technique.

Using the Pentacam™ for IOL Power Calculation

The Pentacam Application for Intrastromal Segment Ring

The intrastromal corneal segment ring is a device designed initially to correct mild-to-moderate myopia by flattening the anterior corneal curvature without encroaching on the visual axis. The device is a two types PMMA transparent ring, one with an outer diameter of 8.1 mm and an inner diameter of 6.8 mm. It is precision lathe-cut to ±0.01 mm as a hexagonal-shaped section of a cone called INTACTS® and the other with 6.3 mm of outer diameter and 5.7 mm of inner diameter in a piramidal shape called FERRARA RINGS®. Those are inserted through a peripheral radial incision made with a diamond knife at two-thirds corneal depth into a 360° peripheral intrastromal channel created with specially designed instruments.1 Anterior corneal curvature is changed by using rings of different thickness. In order to offer the patient the most accurate correction in their ametropic defect we must evaluate corneal changes with advanced imaging modalities, many of which promise to deliver quantitative information and qualitative images of the cornea and anterior chamber. This equipments have a range of applications, including the diagnosis and tracking of pathology, the planning and monitoring of refractive surgery, and the study of accommodation.

The Pentacam Application for Intrastromal Segment Ring

New Advances and Technology with Pentacam

The early detection of ectatic disease is of paramount importance to the refractive surgeon. While measurements such as aberrometry and curvature can be used in evaluating a patient for ectatic disease, they are derivatives of elevation. With subclinical disease, anterior curvature alone may not provide enough information to detect an early corneal abnormality.

New Advances and Technology with Pentacam

Keratoconus / Ectasia Detection with the Oculus Pentacam:

Belin / Ambrósio Enhanced Ectasia Display

While the basis for the development of ectasia may ultimately be a structural, genetic, or biochemical abnormality of the cornea, measurable structural components, such as elevation and pachymetry should be thoroughly evaluated.1 The measurements must be reviewed in a comprehensive manner, rather than assessing isolated values. While measurements such as aberrometry and curvature can be used in evaluating a patient for ectatic disease, they are derivatives of elevation.2With subclinical disease, curvature alone may not provide enough information to detect early corneal abnormality.

Keratoconus / Ectasia Detection

The Pentacam: Offering a Clearer View

The Pentacam Comprehensive Eye Scanner (Oculus, Inc., Lynnwood, WA) continues to expand the field of ophthalmic diagnostics with new features and software, such as densitometry for cataracts. This and other key information on the Pentacam is presented in the following articles, which summarize presentations that were given at two breakfast symposia on November 10th and 11th in New Orleans.

The Pentacam: Offering a Clearer View [533 KB]

Elevate Yourself Above other O.D.s

Accurately measure corneal elevation and curvature in your patients.

Because corneal ectasia has become the common denominator for post-refractive surgery corneal transplants and the instigator for some of the largest lawsuits in refractive surgery today, we must properly screen refractive-surgery candidates for this and other corneal conditions that can preclude successful visual outcomes.

One way you can do this: by using the Pentacam corneal mapping device, from Oculus, Inc. The device provides elevation images of the anterior and posterior cornea.

The Pentacam difference
Common corneal topographers (placido disc imaging) are excellent devices, but you should not solely rely on these instruments to determine refractive-surgery candidacy, for two reasons:

	They only measure the curvature of the anterior surface, which is only half of what determines candidacy. Many conditions, such as keratoconus, originally develop or provide clues from the posterior surface before we can see them on the anterior surface.
	Imaging with these devices is based on one arbitrary reference point. Curvature, when imaged by any device, is an element of elevation of the cornea. The curvature is measured based off of a specific reference point. If this point is not exactly in the center of the map, the relative image of curvature is skewed.

read more

PIOL Simulation for High Res Imaging

Ensuring postoperative safe distances between the iris-fixated phakic IOL and crucial tissues (eg, corneal endothelium, crystalline lens) remains one main challenge in phakic IOL implantation. To assure a more precise and accurate preoperative patient selection, we developed—in cooperation with Oculus Optikgeräte GmbH (Wetzlar, Germany)—a phakic IOL simulation software module. This module, applicable to the new high resolution Pentacam HR (Oculus Optikgeräte GmbH), will improve preoperative diagnostic evaluation. After entering the patient’s refraction, the software calculates the required refractive power of the phakic IOL that is stored in an integrated lens database. This individual phakic IOL is then projected into the patient’s anterior chamber, which has been obtained by regular Scheimpflug measurement. A three-dimensional calculation obtains the values of interest.

PIOL Simulation for High Res Imaging [90 KB]

Software simulates postop phakic IOL position

A study showed minimal differences between simulated and actual lens positions and indicates improved patient selection.

In an effort to improve the safety of phakic IOL positioning, researchers have developed imaging software that can preoperatively simulate the placement of the lenses. Testing showed good correlation between the simulated and actual position of the lens, according to one ophthalmologist. Mana Tehrani, MD, of Johannes Gutenberg-University in Mainz, Germany, said this software could help refractive surgeons identify patients who may be at risk of postoperative complications. “Long-term complications such as progressive endothelial cell loss, pigment dispersion or induction of cataract are still a concern,” Dr. Tehrani said. In cooperation with Oculus, the imaging device manufacturer, Dr. Tehrani and H. Burkhard Dick, MD, developed the software.

Software simulates postop phakic IOL position [131 KB]

PENTACAM System´s Overview: Understanding its Benefits

Theodo Scheimpflug (1865 - 1911) is the pioneer of aerial mapping. He invented the aerial photogrammetry using numerous technical instruments for land surveying from the air. Scheimpflug took photos of the landscape from a ballon or a kite. The resulting oblique views could not be used directly for creating a map but had to be deskewed at first. For this purpose, he createt a specific deskewing device which was completed in 1906. In 1907, he published his fundamental work "Die Herstellung von Karten und Plänen auf photographischem Wege" (The Making of Maps and Plans using Photography).

www.thehighlights.net

PENTACAM System´s Overview (español ) [578 KB]

PENTACAM System´s Overview (english) [578 KB]

Pentacam opens eyes to new diagnostic possibilities

Scheimpflug based anterior segment tomography

The innovative technology of the Oculus Pentacam HR is, with increasing clinical experience, fulfilling its promise as an essential tool for diagnosis, biometry and management of cataract and refractive surgery patients. Tobias Neuhann MD served as moderator of an EuroTimes Satellite Education Programme Symposium on the current state of Scheimpflug based anterior segment tomography during the XXIV Congress of the European Society of Cataract and Refractive Surgeons in London.

Pentacam - new diagnostic possibilities [654 KB]

The Pentacam: Precision, Confidence, Results, and Accurate “Ks!”

Many surgeons who use the Pentacam Comprehensive Eye Scanner (Oculus, Inc., Lynnwood, WA) for the first time worry about misinterpreting the images and mistakenly including or excluding refractive surgery candidates. The key to successfully screening patients with the Pentacam is to create a standardized template that always displays the same maps in the same order using consistent colors and scales. Once you become familiar with the system, you should be able to recognize patterns that tell you if the patient’s eyes are normal, usually in a matter of minutes, if not seconds.

Pentacam AAO 2006 [418 KB]

Scheimpflug Biometry of Anterior Segment After Implantation of Foldable Iris-fixated Lenses

The various surgical options currently availible for the correction of myopia, hyperopia, and astigmatism include corneal refractive surgery and lenticular intraocular procedures. However, phakic intraocular lenses (PIOLs) are becoming increasingly popular. In addition to preserving the corneal shape, PIOLs are potentially reversible...

This is an encrypted file sponsored from OCULUS from the publishing house which can be downloaded while following the instructions. For your information, you have to download a small .exe file to your computer. This is the usual process.

Scheimpflug Biometry of Anterior Segment [164 KB]

Why Cataract and Refractive Surgeons Need the Pentacam

Four surgeons discuss the device’s value, including new software additions.

Almost 10 years ago, I published an article1 showing the extreme variability between different topography systems in the analysis of abnormal corneal shapes. Since then, the ability to accurately image the anterior corneal surface has greatly improved. We are now being told, however, that the elevation of the posterior surface is important in diagnosing early keratoconus and post-LASIK ectasia. Currently, two commercially available systems are able to measure backsurface elevation: the Pentacam comprehensive eye scanner (Oculus, Inc., Lynnwood, WA), which is a rotating Scheimpflug device, and the Orbscan corneal topographer (Bausch & Lomb, Rochster, NY), a scanning slit device.

Why Cataract and Refractive Surgeons... [361 KB]

Topography and Scheimpflug Imaging

Pearls for refractive surgery screening and keratoconus detection.
BY MICHAEL W. BELIN, MD

Detecting keratoconus and performing topographic screenings prior to refractive surgery are particularly timely topics in light of Cataract & Refractive Surgery Today’s Anatomy of a Lawsuit II articles.1-4 After reviewing those pieces, it would be inappropriate for me to comment on the trial and/or its merit. What I will review is the confusing and often unresolved issue of what is topographic evidence of keratoconus.

I perform LASIK on the majority of my patients, but I have always performed a higher percentage (approximately 20%) of surface ablation procedures than is the norm for my geographic area. I have been involved with keratoconus and topography for the better part of my professional life and have presented more than 100 papers at national and international meetings...

Topography and Scheimpflug Imaging [112 KB]

A new look in the eye

Remember how you felt when seeing the first ultrasound photo of your child or grandchild? Your excited perusal of that fuzzy mass of light and dark? Even before the mother showed outward signs of pregnancy, the photograph showed so many details of the growing child.

Augenlicht Summer 05 [344 KB]

The Anterior Chamber, From Every Angle

A rotating Scheimpflug camera measures structure, topography, pachymetry and denistometry.

Christopher Kent - Senior Editor
As procedures become more complex and patient expectations increase, the need for more detailed and accurate clinical information about the eye continues to grow.
One of the new generation of instruments designed to meet that need is the Pentacam, from Oculus. Now approved in the United States for more than a year, the Pentacam provides both familiar and new measurements of the cornea and anterior chamber.

REVIEW Technology Update [583 KB]

The Optics of NearVision CK

The science behind the procedure’s effectiveness in treating presbyopia.

BY JACK T. HOLLADAY, MD, MSEE, FACS
Numerous investigators have found that NearVision CK (Refractec, Inc., Irvine, CA) provides very good near acuity with much less compromise in distance vision than one would expect from a monovision procedure. The reasons for this blended vision effect with NearVision CK, however, have not been well understood.

Clinical Review [129 KB]

EYE TO EYE

Interpretation of Scheimpflug Based Anterior Segment Imaging and Mapping

Ophthalmologists have numerous technologies at their disposal for imaging and investigating the cornea and anterior chamber. For years, conventional slitlamp,keratometry,ultrasound pachymetry,and Placido disc-based topography systems have served clinicians and researchers as helpful tools for evaluation and diagnosis.

EYE TO EYE Scheimpflug [394 KB]

AAO 2004 - A summary of all lectures

Next Generation Technology for the Cataract & Refractive Surgeon

This monograph is based on an educational seminar presented at the 2004 AAO meeting in New Orleans. In it, users of the new Pentacam Comprehensive Eye Scanner describe how the system allows them to perform a wide range of clinical services, from monitoring intraocular changes to treating a wider range of cataract and refractive patients than they could previously.

AAO OCULUS 2004 [331 KB]

OPHTHALMO CHIRURGIE

Special Edition about the Pentacam

In a special edition the OPHTHALMO CHIRURGIE (www.kaden-verlag.de) is reporting about the Pentacam.

Five in One: An Innovation that combines several diagnostic strategies
Pentacam – The World’s First 3 D-Scheimpflug Camera.

For any ophthalmologist who
considers buying a new device
for his private surgery or clinic, the cost-benefit ratio of such an investment is of primary importance.

OPHTHALMO CHIRURGIE [549 KB]

Diagnostic Imaging for Refractive and Cataract Surgery

Advances in diagnostic imaging technology have brought the Pentacam system (Oculus, Inc., Lynnwood, Wash.) to the forefront of the cataract and refractive surgery market. Other instruments and methods traditionally used to obtain diagnostic information do not possess the Pentacam’s precision.

Diagnostic Imaging [405 KB]