Corneal imaging with slit‐scanning and Scheimpflug imaging techniques

Oliveira, Cristina; Ribeiro, Celina; Franco, Sandra

doi:10.1111/j.1444-0938.2010.00509.x

Cited by 93 publications

(63 citation statements)

References 88 publications

(219 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Thus, cycloplegic refraction examinations provided more reliable results in all age groups (17,19) . Recent developments in imaging techniques allow the clinician to quantitatively calculate anterior segment parameters, such as keratometry, CCT, ACD, ACV, and ACA (5,20) . Among these new technologies, the Pentacam device is a rotating Scheimpflug system that allows for the noninvasive assessment of the anterior chamber structures.…”

Section: Discussionmentioning

confidence: 99%

“…The device also analyzes the corneal central radii, corneal asphericity, various colored maps of curvature and elevation, corneal pachymetry, crystalline lens densitometry, and the complete anterior chamber (anterior chamber depth, volume, and angle). The measurements are all non-contact and are free of discomfort to the patient (1,5) .…”

Section: Devices Used In the Studymentioning

confidence: 99%

“…Recently introduced anterior segment imaging technologies, such as rotating Scheimpflug imaging and anterior segment optical coherence tomography, pro mise to overcome these limitations. They offer quantitative information and qualitative imaging of the cornea, anterior chamber, and iridocorneal angle (1,4,5) .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of 1% cyclopentolate hydrochloride on anterior segment parameters obtained with Pentacam in young adults

Arıcı¹,

Türk²,

Ceylan³

et al. 2014

Arquivos Brasileiros De Oftalmologia

View full text Add to dashboard Cite

Purpose: To investigate the effects of topically applied 1% cyclopentolate hydrochloride on anterior segment parameters obtained with a Pentacam rotating Scheimpflug camera in healthy young adults. Methods: Anterior segment analyses of 25 eyes from 25 young adults (Group 1), before and after 45 min of 1% cyclopentolate hydrochloride application, were performed. For a control group (cycloplegia-free, Group 2), 24 eyes of 24 age-and sex-matched healthy cases were evaluated twice at 45 min intervals. The results obtained from the groups were compared statistically. Results: The mean ages of the groups were 23.04 ± 3.42 (range, 18-29) and 22.4 ± 2.05 (range, 18-27) years for Groups 1 and 2, respectively (p=0.259). In Group 1, measurements between the two analyses were significantly different for the values of anterior chamber depth (ACD), anterior chamber angle (ACA), and anterior chamber volume (ACV) (p<0.05), whereas no statistical difference was found for the central corneal thickness (CCT) and keratometry (K1, K2) measurements. In Group 2, none of these parameters were statistically different between the two analyses. Conclusions: Topically applied 1% cyclopentolate hydrochloride caused an increase in the ACD and ACV values, and a decrease in the ACA value. However, it had no significant effect on the CCT and keratometry measurements. It is important to consider these effects when using the Pentacam device on young adults with cycloplegia and when applying it for various reasons.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Devices Used In the Studymentioning

confidence: 99%

See 1 more Smart Citation

Effects of 1% cyclopentolate hydrochloride on anterior segment parameters obtained with Pentacam in young adults

Arıcı¹,

Türk²,

Ceylan³

et al. 2014

Arquivos Brasileiros De Oftalmologia

View full text Add to dashboard Cite

show abstract

“…Both machines gave values comparable with the points lying along the line of equality, with small limits of agreements (Figures 1 and 2). Previous studies have reported good correlations between both machines in either pachymetry or corneal power measurements (6)(7)(8) . One of the main diagnostic tools for keratoconus and keratectasia is abnormal topography.…”

Section: Discussionmentioning

confidence: 81%

Assessment of anterior and posterior corneal indices using two Scheimpflug analyzers

Fahd¹,

Cherfan²,

Raad³

et al. 2014

Arquivos Brasileiros De Oftalmologia

View full text Add to dashboard Cite

Purpose: To assess the agreement between the elevation and curvature measurements of the anterior and posterior corneal surfaces obtained using the Galilei Dual Scheimpflug Analyzer and those obtained using the Pentacam single Scheim pflug system. Methods: This prospective, noninterventional, diagnostic study was conducted at the Department of Ophthalmology at the American University of Beirut (Medical Center) and included 60 eyes of 60 consecutive patients. Measurements were obtained using 2 different Scheimpflug analyzers (Galilei and Pentacam). The best-fit sphere was set at 8 mm in both machines. Pachymetry (CCT), anterior elevation (AE) and posterior elevation (PE), and curvature were assessed. Pearson's correlation coefficients, comparison of means, and Bland-Altman plots were used to evaluate agreement between the 2 systems. Results: The average CCT (at the corneal apex) was 533 ± 35 μm and 532 ± 37 μm (p=0.980), the average central AE was 1.25 ± 3.95 μm and 2.

show abstract

“…There are currently five devices on the market that are based on these technologies: Orbscan IIz (Bausch & Lomb Surgical, Inc), Pentacam (Oculus, Inc), the Galilei (Ziemer Ophthalmic Systems AG,) the Precisio (Ligi Tecnologie Medicali), and the Sirius (CSO Ophthalmic). The Orbscan IIz is the only slit-scanning-based technology; the others involve Scheimpflug-based technology [2].…”

Section: Introductionmentioning

confidence: 99%

Corneal Evaluation in Healthy Brazilian Children Using a Scheimpflug Topography System

Is¹,

Mf²,

Camila³

et al. 2017

J Clin Exp Ophthalmol

View full text Add to dashboard Cite

Purpose: To identify the distribution and variation in corneal topography, thickness, and elevation in healthy Brazilian children as measured by the Pentacam Scheimpflug system (Oculus Optikgeräte GmbH, Wetzlar, Germany). Methods:Healthy children between 7 and 11 years of age were scanned using the Pentacam Scheimpflug corneal topography system (Oculus Optikgeräte GmbH, Wetzlar, Germany). The exclusion criteria were inability to undergo the ocular exam, history of any ocular diseases (including strabismus, amblyopia, cataracts, retinal disorders, and allergic conjunctivitis), and topographic diagnosis of corneal ectasia based on the modified Rabinowitz/McDonnell criteria for keratoconus. The right eye of each subject was selected for analysis. The parameters evaluated were central corneal thickness (CCT), thinnest pachymetry (TP), average pachymetric progression index (PPIave), anterior and posterior elevation (AE and PE), anterior and posterior best fit sphere (ABFS and PBFS), pachymetric difference between the apex and the thinnest point (PDAT), Ambrosio's relational thickness (ARTMax), overall Belin/Ambrósio Enhanced Ectasia display score (BAD-D), simulated keratometry (SimK), astigmatism in SimK (SimK astig), maximum keratometry (K max), asphericity (Q value), and anterior chamber depth (ACD).Results: A total of 160 children (69 male, 91 female) were included in this study. The mean age of the children was 8.82 ± 1.23 years (ranging from 7 to 11 years). The mean CCT was 553.81 ± 32 µm, and mean TP was 547.95 ± 32.06 µm. The TP was most commonly located in the inferotemporal quadrant in 93.125% (149) eyes. The mean PPIave was 1.00 ± 0.14, similar to that of normal adults. The mean ABFS and PBFS values were 7.49 ± 3.26 and 10.54 ± 6.25, respectively. ART Max and D averaged 446.57 ± 81.20 and 0.78 ± 0.65, respectively. Mean ± SD values for SimK, SimK astig, and K max were 43.35 ± 1.31 D, 0.92 ± 0.66 D, and 44.40 ± 1.45 D respectively. The K max and SimK astig values were close to those reported by other topographic systems for children. Q value and ACD averaged -0.39 ± 0.12 and 3.065 ± 0.2745 mm. Conclusion:This study provides normative values for corneal topography, thickness, and elevation in healthy Brazilian children. These results may provide helpful information for diagnosis of corneal diseases in children. Further studies are needed to evaluate the role of tomography in identifying early forms of ectasia in this age group.

show abstract

Corneal imaging with slit‐scanning and Scheimpflug imaging techniques

Cited by 93 publications

References 88 publications

Effects of 1% cyclopentolate hydrochloride on anterior segment parameters obtained with Pentacam in young adults

Effects of 1% cyclopentolate hydrochloride on anterior segment parameters obtained with Pentacam in young adults

Assessment of anterior and posterior corneal indices using two Scheimpflug analyzers

Corneal Evaluation in Healthy Brazilian Children Using a Scheimpflug Topography System

Contact Info

Product

Resources

About