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Anterior ChamberCorneal PachymetryPhotographyLens Nucleus, CrystallineAnterior Eye SegmentCorneal TopographyCorneaDensitometryDiagnostic Techniques, OphthalmologicalIrisCataractAqueous HumorLens, CrystallineLens Capsule, CrystallineAccommodation, OcularLens Implantation, IntraocularGonioscopyGlaucoma, Angle-ClosureIntraocular PressureTrabecular MeshworkCataract ExtractionEyeIris DiseasesCiliary BodyScleraDiagnostic ImagingBiometryUveitis, AnteriorHyphemaMicroscopy, AcousticLenses, IntraocularGlaucomaPhacoemulsificationCorneal EdemaFluorophotometryEndophthalmitisEndothelium, CornealEye DiseasesEye NeoplasmsVitreous BodyBlood-Aqueous BarrierImage Processing, Computer-AssistedIridectomyLens SubluxationRefraction, OcularUveaIritisInjectionsDescemet MembraneParacentesisReproducibility of ResultsAxial Length, EyeCorneal TransplantationEye Infections, ParasiticRefractive ErrorsTonometry, OcularEye EnucleationOphthalmic SolutionsTomography, Optical CoherenceViscoelastic SubstancesVisual AcuityUveitisLens DiseasesUveal DiseasesMyopiaTrabeculectomyCorneal DiseasesDiffusion Chambers, CulturePupilEye Infections, BacterialCarcinoma, Brown-PearceOcular HypotensionLaser TherapyHyperopiaPseudophakiaHypersensitivity, DelayedCorneal OpacityMydriaticsRetinitisEye AbnormalitiesGlaucoma, NeovascularInterferometryRabbitsOcular HypertensionOcular Physiological PhenomenaEye InjuriesEye Infections, ViralSclerostomyGlaucoma, Open-AngleVitrectomyCorneal Endothelial Cell LossEye HemorrhageMacaca fascicularisPilocarpineTropicamideOphthalmologic Surgical ProceduresMoxisylyteAtmosphere Exposure ChambersEye Diseases, HereditaryIridocyclitis
CorneaTomographyRotating Scheimpflug camera systemCentral corneal thicknessPentacamThicknessMeasurementsCurvaturePachymetryAngleDepthUltrasoundCrystalline lensParametersGlaucomaKeratoplastyOcular anterior segmentPhakicOphthalmologyIntraocularCameraAstigmatismIrisPIOLPupilLimited anterior segmentSystemImagesPatientsStromaDistancesLensesCharacteristic
Cornea7
  • Specifically, Scheimpflug imaging is useful in highlighting the exaggerated flattening of the anterior cornea that commonly accompanies CTK [7] . (aao.org)
  • In addition to the depth of the anterior chamber, the curvature of the cornea, and thus its refractive power can be measured using AS OCT by matching curves to the anterior and posterior surfaces of the cornea. (entokey.com)
  • I work as a cornea and anterior segment consultant at the LV Prasad Eye Institute in India. (cybersight.org)
  • The Scheimpflug technique makes sharp and clear images that contain information from the anterior surface of the cornea to the posterior surface of the lens. (oogkliniekwinksele.be)
  • Tomography provides a representation of the cornea by creating a cross section of the anterior part of the eye. (oogkliniekwinksele.be)
  • Conventional keratometry is based on measurements of the anterior surface of the cornea only. (phacooptics.net)
  • PhacoOptics ® supports data handling of posterior cornea measurements as can be obtained by modern anterior segment imaging systems (Scheimpflug, OCT) and this can be of benefit in toric implantations in post-LASIK cases and other unusual corneas. (phacooptics.net)
Tomography13
  • Anterior chamber depth can be measured by ultrasound biomicroscopy, anterior segment optical coherence tomography (OCT), partial coherence interferometry, slit-beam topography, or Scheimpflug imaging. (aao.org)
  • Scheimpflug imaging and optical coherence tomography (OCT) imaging studies may offer diagnostic clues into CTK-specific corneal alterations. (aao.org)
  • In addition to anterior segment tomography the Pentacam ® AXL has integrated axial length measurement, a feature which allows you to make accurate IOL calculations. (pentacam.com)
  • To measure anterior ocular biometry, Placido disk reflection, slit-scanning tomography, a rotating Scheimpflug camera, and anterior segmental optical coherence tomography are mainly used. (ekjo.org)
  • Comparison of Scheimpflug imaging and spectral domain anterior segment optical coherence tomography for detection of narrow anterior chamber angles. (drcremers.com)
  • Optical coherence tomography (OCT) has extensive applications in the posterior segment (PS), and development of this technology for the anterior segment (AS) also has particular uses in cataract surgery. (entokey.com)
  • Fig. 14.1 Optical coherence tomography of whole anterior segment with size parameters. (entokey.com)
  • However, if there is significant corneal edema, imaging tools such as anterior segment optical coherence tomography (AS-OCT) are fundamental for the diagnosis. (eyewiki.org)
  • The most used and accurate exam for the diagnosis of DMDs is the anterior segment optical coherence tomography (AS-OCT). AS-OCT is a quick, non-contact modality that can determine the exact location, configuration, and extent of the DMD, not only confirming the diagnosis but also guiding the treatment method and outcomes. (eyewiki.org)
  • WTW can be easily measured using different methods such as surgical calipers, corneal topography, ocular biometry or, more recently, optical coherence tomography (OCT). However, the truth is that angle-to-angle (ATA) or spur-to-spur (STS) distances are the most appropriate values to calculate the size of anterior-segment phakic IOLs. (biomedcentral.com)
  • Determining subclinical edema in Fuchs endothelial corneal dystrophy: revised classification using Scheimpflug tomography for preoperative assessment. (jamanetwork.com)
  • Decentration measurements using Placido corneal tangential curvature topography and Scheimpflug tomography pachymetry difference maps after small-incision lenticule extraction Journal of Cataract and Refractive Surgery. (londonvisionclinic.com)
  • [ 22 ] Anterior segment optic coherence tomography (OCT) is an instrument that can produce such maps. (medscape.com)
Rotating Scheimpflug camera system2
  • The pentacam is a rotating Scheimpflug camera system that makes images of the anterior segment of the eye. (oogkliniekwinksele.be)
  • The Pentacam is a high-resolution rotating Scheimpflug camera system for anterior segment analysis. (taubereye.com)
Central corneal thickness2
  • Measurements recorded by each machine included keratometry (K), axial length (AL), astigmatism, anterior chamber depth (ACD), central corneal thickness (CCT), lens thickness (LT), white to white (WTW) and intraocular lens (IOL) power. (org.pk)
  • There were no significant changes in the anterior chamber volume, anterior chamber angle, central corneal thickness, or pupil size from before to after capsulotomy in either group. (ekjo.org)
Pentacam5
  • Within a mere 2 seconds the Pentacam ® AXL supplies you with precise diagnostic data on the entire anterior eye segment. (pentacam.com)
  • Pentacam HR (Oculus, Wetzlar, Germany), using the rotating Scheimpflug camera analysis system, can evaluate the entire ocular anterior segment from the anterior corneal surface to the posterior lens surface. (ekjo.org)
  • Quantitative analysis of anterior chamber following peripheral laser iridotomy using Pentacam in eyes with primary angle closure. (drcremers.com)
  • Records were reviewed for the anterior chamber depth (ACD) and white-to-white (WTW) measurements obtained from the Orbscan II, IOLMaster 700, Pentacam AXL, and Castroviejo caliper (WTW only). (biomedcentral.com)
  • The team used the Pentacam rotating Scheimpflug camera (Oculus Inc.) to analyse the eyes preoperatively and then at 1 day, 1 week, 1 month and 3 months postoperatively to determine if there were any changes in parameters. (ophthalmologytimes.com)
Thickness6
  • Precise measurements of the ocular anterior segment, including corneal refractive power, corneal thickness, and anterior chamber depth, are important factors for cataract and corneal refractive surgery, as well as postoperative evaluation. (ekjo.org)
  • Lens thickness can also be measured with AS OCT, which is useful for hypermature cataracts before surgery to make the surgeon aware that the capsule may be under tension and the necessary precautions to avoid an anterior capsular tear can be implemented. (entokey.com)
  • A significant advantage of the femtosecond laser-and one that was possibly not anticipated in the early days of laser cataract surgery-is that the incorporated OCT imaging gives the surgeon much more information about the anatomy of the eye, the anterior chamber, and the lens thickness. (crstoday.com)
  • For example, in a short eye with a shallow chamber, if the crystalline lens is of normal thickness, I would expect the IOL that replaces it to sit slightly forward and therefore have more power. (crstoday.com)
  • PhacoOptics ® IOL power calculation incorporates the latest generation ELP (estimated lens plane) prediction algorithms, including the patented C-constant concept by which the physical IOL position is predicted from the preoperative anatomy of the crystalline lens (anterior chamber depth and lens thickness). (phacooptics.net)
  • This test, using either scanning slit-beam or Scheimpflug technology, gives information about corneal thickness and posterior corneal curvature, in addition to the anterior corneal curvature information that is presented on standard corneal topographic maps. (medscape.com)
Measurements5
  • In the new era of intraocular lens techniques and the advent of laser refractive surgery, accurate measurements of anterior ocular biometry and considering them together are becoming much more important. (ekjo.org)
  • Conclusion: The back-scattered light from anterior cortical lens could affect laser flare photometry measurements. (gazi.edu.tr)
  • Partial coherence inferometry and Scheimpflug measurements were comparable, as were both manual and automated AS OCT but not each pair with the other. (entokey.com)
  • Measurements were taken of the anterior and posterior corneal curvature, anterior and posterior corneal astigmatism, anterior chamber depth (ACD), anterior chamber volume (ACV) and anterior chamber angle before and after surgery. (ophthalmologytimes.com)
  • Each participant underwent biomechanical measurements by using the Corneal Visualization Scheimpflug Technology. (arvojournals.org)
Curvature1
  • The study led by Dr Na'ama Hammel (Department of Ophthalmology, Rabin Medical Center, Petah-Tiqva, Israel) analysed 19 eyes of 19 patients to evaluate if the Ex-PRESS miniature glaucoma implant surgery would affect corneal curvature and anterior segment parameters. (ophthalmologytimes.com)
Pachymetry1
  • In the left eye (OS) of case 8, the anterior (A-C) and posterior (D-F) keratometric values show significant corneal flattening, whereas the pachymetry (G-I) remains unchanged. (jamanetwork.com)
Angle12
  • Primary open angle glaucoma (POAG) is characterized by an elevated IOP at some point during the course of the disease with an open anterior chamber angle and a characteristic optic nerve and/or visual field change in the absence of concurrent ocular disease. (medscape.com)
  • A few examples of secondary glaucoma causes include pigment dispersion and pseudoexfoliation syndrome, uveitis with the formation of peripheral anterior synechiae in the iridocorneal angle, intraocular hemorrhage with trabecular meshwork obstruction, intraocular neoplasia, and lens displacement. (medscape.com)
  • If the anterior chamber depth is less than 3.2 mm, the risk of endothelial and iris or angle trauma from placement of an anterior chamber, iris-fixated, or posterior chamber PIOL is increased. (aao.org)
  • Abnormalities of the anterior segment such as visualization of anterior chamber angle vessels (79.03%) and iris vessels (51.21%), iris process (42.34%), persistent pupillary membranes (19.35%), albinism, congenital cataracts, corneal leucoma, and subconjunctival hemorrhage were observed in this study. (bvsalud.org)
  • In addition, although visualization of anterior chamber angle vessels differed within the birth gestation age and weight at examination groups, there was no significant correlation by regression analysis. (bvsalud.org)
  • The neonatal iris and anterior chamber angle are immature, and the visible vessels at the anterior chamber angle that vanish later than the surface of the iris are characteristic structures. (bvsalud.org)
  • To examine the size of the ciliary body stroma (CBS) in dependence of the morphology of the anterior chamber angle in enucleated human eyes, we histomorphometrically examined human enucleated eyes. (bvsalud.org)
  • The anterior chamber angle was open in 68 eyes and it was closed and endothelialized in 39 eyes. (bvsalud.org)
  • The findings suggest that the CBS size is markedly smaller in eyes with a chronically closed endothelialized anterior chamber angle than in eyes with open angles. (bvsalud.org)
  • The appearance of the anterior chamber angle before and after phacoemulsification has been studied and showed, across a range patients aged between 15 and 91 years, that the angle-opening distance and the iris-trabecular space increased in all of them ( Fig. 14.2 ). (entokey.com)
  • Studies assessing the effects of Nd:YAG laser capsulotomy on anterior chamber parameters, including anterior chamber depth (ACD), anterior chamber angle (ACA), and the refractive index, have yielded conflicting results [ 7 , 9 , 10 , 11 , 12 , 13 ]. (ekjo.org)
  • It measures the anterior and posterior corneal topography and elevation, total corneal refractive power, corneal power distribution, automatic chamber angle measurement in 360°, chamber depth and volume, and shows corneal and crystalline lens optical opacities. (taubereye.com)
Depth6
  • The anterior chamber diameter, anterior chamber depth, and pupil size must be appropriate for the specific PIOL being considered. (aao.org)
  • Anterior chamber depth must also be assessed because adequate depth is required for safe implantation of a PIOL. (aao.org)
  • In the United States, PIOL implantation is contraindicated in individuals who do not meet the minimum endothelial cell count specified for each PIOL and who do not have a minimum anterior chamber depth of 3.2 mm. (aao.org)
  • Background: To evaluate effect of maximal anterior cortical lens density, iris scatter and anterior chamber depth on laser flare photometry. (gazi.edu.tr)
  • Mean anterior chamber depth, pupil aperture, maximal anterior cortical lens density and iris scatter values were compared between two groups. (gazi.edu.tr)
  • Although the depth of the anterior chamber is generally measured as part of the biometry process, whether optically or with ultrasound, there is a place for OCT also. (entokey.com)
Ultrasound1
  • Other less-used tools are ultrasound biomicroscopy, Scheimpflug imaging and confocal microscopy. (eyewiki.org)
Crystalline lens2
  • The vault, which is the safe distance between the posterior surface of the ICL and the anterior capsule of the crystalline lens, is the measurable gauge of how the ICL best fits in the sulcus space. (biomedcentral.com)
  • Knowing how big the crystalline lens is in relation to the anterior chamber helps me prepare for surgery and may eventually allow me to more accurately predict the effective lens position (ELP). (crstoday.com)
Parameters6
  • Implantation of the Ex-PRESS miniature device has been found to have no lasting effects on anterior segment parameters, according to recently published data in the Journal of Glaucoma. (ophthalmologytimes.com)
  • However, at 3 months post-op these changes in anterior segment parameters were not found to be statistically significant. (ophthalmologytimes.com)
  • To compare changes in anterior segment parameters after Nd:YAG laser capsulotomy in eyes that underwent either combined phacovitrectomy or cataract surgery. (ekjo.org)
  • To our knowledge, data are lacking regarding the effects of Nd:YAG laser capsulotomy on anterior chamber parameters in patients that developed PCO after combined phacovitrectomy. (ekjo.org)
  • Voncken Santana S, Vasiliauskaitė I, van Dijk K, van Tilborg M, Melles GRJ, Kocaba V, Oellerich S. Impact of Fuchs endothelial corneal dystrophy severity on Scheimpflug-derived parameters after DMEK. (niios.com)
  • Oellerich S. Impact of Fuchs endothelial corneal dystrophy severity on Scheimpflug-derived parameters after DMEK. (niios-us.com)
Glaucoma1
  • In addition, the presentations covered phaco in patients with uveitis, Fuchs dystrophy, intraoperative floppy iris syndrome (IFIS) and small pupils, diabetic retinopathy, glaucoma, pseudoexfoliation with weak zonules, high myopia, and high hyperopia with a crowded anterior segment. (aao.org)
Keratoplasty3
  • Deep anterior lamellar keratoplasty: The Melles Technique. (niios.com)
  • Traumatic graft dehiscence after anterior lamellar keratoplasty. (utswmed.org)
  • Corneal power measurement with a rotating Scheimpflug imaging system after Descemet-stripping automated endothelial keratoplasty. (utswmed.org)
Ocular anterior segment1
  • PURPOSE: The aim of this study was to evaluate and summarize the developmental rules of the ocular anterior segment of neonates by means of wild-field digital imaging system. (bvsalud.org)
Phakic1
Ophthalmology1
  • However, in some jurisdictions, the boundary between optometry and ophthalmology is blurred because both can diagnose and manage errors of refraction, dry eye, binocular vision anomalies, anterior segment diseases, posterior segment diseases, and other problems. (issuu.com)
Intraocular1
Camera1
  • The Corvis ST uses an ultra-high-speed Scheimpflug camera to record corneal deformation in real time and provides direct information on corneal biomechanical behavior [ 15 ] and could potentially provide more information on corneal biomechanics than ORA [ 16 ]. (biomedcentral.com)
Astigmatism1
  • The anterior corneal astigmatism and posterior corneal astigmatism increased, and the ACD and ACV both decreased on the first post-op day. (ophthalmologytimes.com)
Iris2
  • Back-scattering from anterior cortical lens and anterior iris surface was calculated from Scheimpflug images. (gazi.edu.tr)
  • Considering that the ICL has an anterior vault design and is placed directly behind the iris which may keep the ICL in contact with the iris, it is possible that the implantation of an ICL will affect pupil dynamics under scotopic conditions or photopic conditions. (biomedcentral.com)
PIOL1
Pupil1
  • The measured aqueous flare was significantly related to clinical flare, maximal anterior cortical lens density and pupil aperture (adjusted R-2: 0.480, p (gazi.edu.tr)
Limited anterior segment1
  • This increase in lens circumference can encroaches on an already limited anterior segment space in some patients. (drcremers.com)
System3
  • METHODS: We used the wide-field digital imaging system to sequentially capture images of the neonates' eyes within 42 days after delivery, including the ocular surface, anterior segment, and fundus. (bvsalud.org)
  • CONCLUSIONS: The anterior segment of perinatal neonates can be visualized by the wide-field digital imaging system. (bvsalud.org)
  • The Victus (Bausch + Lomb) laser uses real-time streaming swept-source OCT (Figure 2), and the Lensar Laser System (Lensar) uses Scheimpflug-guided imaging. (crstoday.com)
Images1
  • Scheimpflug images were obtained from 105 eyes. (gazi.edu.tr)
Patients1
  • ASCRS empowers Anterior Segment Surgeons to improve the vision, outcomes and quality of life for their patients through innovative approaches to Education, Advocacy and Philanthropy. (ascrs.org)
Stroma1
  • OCT imaging may show the opacity as an "inverse dome" that extends from the anterior to posterior stroma with homogenous reflectivity. (aao.org)
Distances1
Lenses1
Characteristic1
  • Similarly, unlike infectious or inflammatory processes which exhibit characteristic features, CTK rarely presents with anterior chamber reaction, conjunctival hyperemia, or ciliary flush [7] . (aao.org)